diff --git a/CHANGELOG.md b/CHANGELOG.md
index 091fc015cf..a021630af8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,13 @@
 > make sure you follow our [migration guide](https://docs.sentry.io/platforms/react-native/migration/) first.
 <!-- prettier-ignore-end -->
 
+## Unreleased
+
+### Fixes
+
+- Deep merge custom `styles` with defaults in `FeedbackWidget` instead of replacing them ([#5625](https://github.com/getsentry/sentry-react-native/pull/5625))
+  - Note that partial style overrides now preserve default properties like padding and borders
+
 ## 7.12.0
 
 ### Features
diff --git a/packages/core/src/js/feedback/FeedbackWidget.tsx b/packages/core/src/js/feedback/FeedbackWidget.tsx
index 2725b3747a..7029792444 100644
--- a/packages/core/src/js/feedback/FeedbackWidget.tsx
+++ b/packages/core/src/js/feedback/FeedbackWidget.tsx
@@ -260,7 +260,15 @@ export class FeedbackWidget extends React.Component<FeedbackWidgetProps, Feedbac
     const config: FeedbackGeneralConfiguration = this.props;
     const imagePickerConfiguration: ImagePickerConfiguration = this.props;
     const text: FeedbackTextConfiguration = this.props;
-    const styles: FeedbackWidgetStyles = { ...defaultStyles(theme), ...this.props.styles };
+    const _defaultStyles = defaultStyles(theme);
+    const _propStyles = this.props.styles || {};
+    const styles = (Object.keys(_defaultStyles) as Array<keyof FeedbackWidgetStyles>).reduce<FeedbackWidgetStyles>(
+      (merged, key) => {
+        (merged as Record<string, unknown>)[key] = { ...(_defaultStyles[key] as object), ...(_propStyles[key] as object) };
+        return merged;
+      },
+      {},
+    );
     const onCancel = (): void => {
       if (onFormClose) {
         onFormClose();
diff --git a/packages/core/test/feedback/FeedbackWidget.test.tsx b/packages/core/test/feedback/FeedbackWidget.test.tsx
index 1e424cde77..ae31422b62 100644
--- a/packages/core/test/feedback/FeedbackWidget.test.tsx
+++ b/packages/core/test/feedback/FeedbackWidget.test.tsx
@@ -149,6 +149,30 @@ describe('FeedbackWidget', () => {
     expect(toJSON()).toMatchSnapshot();
   });
 
+  it('deep merges custom styles with defaults instead of replacing them', () => {
+    const partialStyles: FeedbackWidgetStyles = {
+      input: {
+        color: '#ff0000',
+      },
+    };
+    const { getByTestId } = render(
+      <FeedbackWidget {...defaultProps} styles={partialStyles} />,
+    );
+
+    const nameInput = getByTestId('sentry-feedback-name-input');
+    const inputStyle = nameInput.props.style;
+
+    // The custom color should be applied
+    expect(inputStyle.color).toBe('#ff0000');
+    // Default properties should be preserved, not lost
+    expect(inputStyle.height).toBe(50);
+    expect(inputStyle.borderWidth).toBe(1);
+    expect(inputStyle.borderRadius).toBe(5);
+    expect(inputStyle.paddingHorizontal).toBe(10);
+    expect(inputStyle.marginBottom).toBe(15);
+    expect(inputStyle.fontSize).toBe(16);
+  });
+
   it('renders correctly', () => {
     const { getByPlaceholderText, getByText, getByTestId, queryByText } = render(<FeedbackWidget {...defaultProps} />);
 
diff --git a/packages/core/test/feedback/__snapshots__/FeedbackWidget.test.tsx.snap b/packages/core/test/feedback/__snapshots__/FeedbackWidget.test.tsx.snap
index a3841f1597..6667e7b1c4 100644
--- a/packages/core/test/feedback/__snapshots__/FeedbackWidget.test.tsx.snap
+++ b/packages/core/test/feedback/__snapshots__/FeedbackWidget.test.tsx.snap
@@ -24,6 +24,8 @@ exports[`FeedbackWidget matches the snapshot with custom styles 1`] = `
   style={
     {
       "backgroundColor": "#ffffff",
+      "flex": 1,
+      "padding": 20,
     }
   }
 >
@@ -39,7 +41,11 @@ exports[`FeedbackWidget matches the snapshot with custom styles 1`] = `
       style={
         {
           "color": "#ff0000",
+          "flex": 1,
           "fontSize": 20,
+          "fontWeight": "bold",
+          "marginBottom": 20,
+          "textAlign": "left",
         }
       }
       testID="sentry-feedback-form-title"
@@ -67,6 +73,7 @@ exports[`FeedbackWidget matches the snapshot with custom styles 1`] = `
       {
         "color": "#00ff00",
         "fontSize": 15,
+        "marginBottom": 4,
       }
     }
   >
@@ -78,9 +85,13 @@ exports[`FeedbackWidget matches the snapshot with custom styles 1`] = `
     style={
       {
         "borderColor": "#0000ff",
+        "borderRadius": 5,
+        "borderWidth": 1,
         "color": "#000000",
         "fontSize": 13,
         "height": 50,
+        "marginBottom": 15,
+        "paddingHorizontal": 10,
       }
     }
     testID="sentry-feedback-name-input"
@@ -91,6 +102,7 @@ exports[`FeedbackWidget matches the snapshot with custom styles 1`] = `
       {
         "color": "#00ff00",
         "fontSize": 15,
+        "marginBottom": 4,
       }
     }
   >
@@ -103,9 +115,13 @@ exports[`FeedbackWidget matches the snapshot with custom styles 1`] = `
     style={
       {
         "borderColor": "#0000ff",
+        "borderRadius": 5,
+        "borderWidth": 1,
         "color": "#000000",
         "fontSize": 13,
         "height": 50,
+        "marginBottom": 15,
+        "paddingHorizontal": 10,
       }
     }
     testID="sentry-feedback-email-input"
@@ -116,6 +132,7 @@ exports[`FeedbackWidget matches the snapshot with custom styles 1`] = `
       {
         "color": "#00ff00",
         "fontSize": 15,
+        "marginBottom": 4,
       }
     }
   >
@@ -130,13 +147,18 @@ exports[`FeedbackWidget matches the snapshot with custom styles 1`] = `
       [
         {
           "borderColor": "#0000ff",
+          "borderRadius": 5,
+          "borderWidth": 1,
           "color": "#000000",
           "fontSize": 13,
           "height": 50,
+          "marginBottom": 15,
+          "paddingHorizontal": 10,
         },
         {
           "color": "#00ff00",
           "height": 50,
+          "textAlignVertical": "top",
         },
       ]
     }
@@ -173,8 +195,12 @@ exports[`FeedbackWidget matches the snapshot with custom styles 1`] = `
     onStartShouldSetResponder={[Function]}
     style={
       {
+        "alignItems": "center",
         "backgroundColor": "#ffff00",
+        "borderRadius": 5,
+        "marginBottom": 10,
         "opacity": 1,
+        "paddingVertical": 15,
       }
     }
   >
@@ -220,7 +246,13 @@ exports[`FeedbackWidget matches the snapshot with custom styles 1`] = `
     onStartShouldSetResponder={[Function]}
     style={
       {
+        "alignItems": "center",
+        "backgroundColor": "#ffffff",
+        "borderColor": "rgba(41, 35, 47, 0.13)",
+        "borderRadius": 5,
+        "borderWidth": 1,
         "opacity": 1,
+        "padding": 15,
         "paddingVertical": 10,
       }
     }
@@ -263,6 +295,8 @@ exports[`FeedbackWidget matches the snapshot with custom styles and screenshot b
   style={
     {
       "backgroundColor": "#ffffff",
+      "flex": 1,
+      "padding": 20,
     }
   }
 >
@@ -278,7 +312,11 @@ exports[`FeedbackWidget matches the snapshot with custom styles and screenshot b
       style={
         {
           "color": "#ff0000",
+          "flex": 1,
           "fontSize": 20,
+          "fontWeight": "bold",
+          "marginBottom": 20,
+          "textAlign": "left",
         }
       }
       testID="sentry-feedback-form-title"
@@ -306,6 +344,7 @@ exports[`FeedbackWidget matches the snapshot with custom styles and screenshot b
       {
         "color": "#00ff00",
         "fontSize": 15,
+        "marginBottom": 4,
       }
     }
   >
@@ -317,9 +356,13 @@ exports[`FeedbackWidget matches the snapshot with custom styles and screenshot b
     style={
       {
         "borderColor": "#0000ff",
+        "borderRadius": 5,
+        "borderWidth": 1,
         "color": "#000000",
         "fontSize": 13,
         "height": 50,
+        "marginBottom": 15,
+        "paddingHorizontal": 10,
       }
     }
     testID="sentry-feedback-name-input"
@@ -330,6 +373,7 @@ exports[`FeedbackWidget matches the snapshot with custom styles and screenshot b
       {
         "color": "#00ff00",
         "fontSize": 15,
+        "marginBottom": 4,
       }
     }
   >
@@ -342,9 +386,13 @@ exports[`FeedbackWidget matches the snapshot with custom styles and screenshot b
     style={
       {
         "borderColor": "#0000ff",
+        "borderRadius": 5,
+        "borderWidth": 1,
         "color": "#000000",
         "fontSize": 13,
         "height": 50,
+        "marginBottom": 15,
+        "paddingHorizontal": 10,
       }
     }
     testID="sentry-feedback-email-input"
@@ -355,6 +403,7 @@ exports[`FeedbackWidget matches the snapshot with custom styles and screenshot b
       {
         "color": "#00ff00",
         "fontSize": 15,
+        "marginBottom": 4,
       }
     }
   >
@@ -369,13 +418,18 @@ exports[`FeedbackWidget matches the snapshot with custom styles and screenshot b
       [
         {
           "borderColor": "#0000ff",
+          "borderRadius": 5,
+          "borderWidth": 1,
           "color": "#000000",
           "fontSize": 13,
           "height": 50,
+          "marginBottom": 15,
+          "paddingHorizontal": 10,
         },
         {
           "color": "#00ff00",
           "height": 50,
+          "textAlignVertical": "top",
         },
       ]
     }
@@ -422,8 +476,14 @@ exports[`FeedbackWidget matches the snapshot with custom styles and screenshot b
       onStartShouldSetResponder={[Function]}
       style={
         {
+          "alignItems": "center",
           "backgroundColor": "#00ff00",
+          "borderColor": "rgba(41, 35, 47, 0.13)",
+          "borderRadius": 5,
+          "borderWidth": 1,
+          "flex": 1,
           "opacity": 1,
+          "padding": 15,
         }
       }
     >
@@ -469,8 +529,12 @@ exports[`FeedbackWidget matches the snapshot with custom styles and screenshot b
     onStartShouldSetResponder={[Function]}
     style={
       {
+        "alignItems": "center",
         "backgroundColor": "#ffff00",
+        "borderRadius": 5,
+        "marginBottom": 10,
         "opacity": 1,
+        "paddingVertical": 15,
       }
     }
   >
@@ -516,7 +580,13 @@ exports[`FeedbackWidget matches the snapshot with custom styles and screenshot b
     onStartShouldSetResponder={[Function]}
     style={
       {
+        "alignItems": "center",
+        "backgroundColor": "#ffffff",
+        "borderColor": "rgba(41, 35, 47, 0.13)",
+        "borderRadius": 5,
+        "borderWidth": 1,
         "opacity": 1,
+        "padding": 15,
         "paddingVertical": 10,
       }
     }