feat(ios): expose UIGlassEffect clear variant via new backgroundGlass prop

ios/TrueSheetView.mm

@@ -187,6 +187,9 @@ - (void)updateProps:(Props::Shared const &)props oldProps:(Props::Shared const &
   // Blur tint
   _controller.backgroundBlur = newProps.backgroundBlur;
 
+  // Liquid Glass style (iOS 26+)
+  _controller.backgroundGlass = newProps.backgroundGlass;
+
   // Blur options
   const auto &blurOpts = newProps.blurOptions;
   _controller.blurIntensity = blurOpts.intensity >= 0 ? @(blurOpts.intensity) : nil;

ios/TrueSheetViewController.h

@@ -65,6 +65,7 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic, assign) BOOL dimmed;
 @property (nonatomic, strong, nullable) NSNumber *dimmedDetentIndex;
 @property (nonatomic, assign) facebook::react::TrueSheetViewBackgroundBlur backgroundBlur;
+@property (nonatomic, assign) facebook::react::TrueSheetViewBackgroundGlass backgroundGlass;
 @property (nonatomic, strong, nullable) NSNumber *blurIntensity;
 @property (nonatomic, assign) BOOL blurInteraction;
 @property (nonatomic, assign) BOOL pageSizing;

ios/TrueSheetViewController.mm

@@ -746,7 +746,16 @@ - (void)setupBackground {
         self.sheet.backgroundEffect = [UIColorEffect effectWithColor:self.backgroundColor];
       } else if (hasBlur) {
         self.sheet.backgroundEffect = [UIColorEffect effectWithColor:[UIColor clearColor]];
+      } else if (self.backgroundGlass == facebook::react::TrueSheetViewBackgroundGlass::Clear) {
+        // Clear glass variant (iOS 26+). Higher transparency, no luminosity
+        // veil. Designed for media-rich backgrounds; typically paired with
+        // an explicit dimming/blur layer for content legibility.
+        UIGlassEffect *glass = [UIGlassEffect effectWithStyle:UIGlassEffectStyleClear];
+        glass.interactive = YES;
+        self.sheet.backgroundEffect = glass;
       } else {
+        // Default: let the system apply iOS 26's standard Liquid Glass
+        // (UIGlassEffectStyleRegular under the hood).
         self.sheet.backgroundEffect = nil;
       }
       return;

src/TrueSheet.tsx

@@ -441,6 +441,7 @@ export class TrueSheet extends PureComponent<TrueSheetProps, TrueSheetState> {
       initialDetentAnimated = true,
       dimmedDetentIndex,
       backgroundBlur,
+      backgroundGlass,
       blurOptions,
       cornerRadius,
       maxContentHeight,
@@ -487,6 +488,7 @@ export class TrueSheet extends PureComponent<TrueSheetProps, TrueSheetState> {
         style={styles.sheetView}
         detents={resolvedDetents}
         backgroundBlur={backgroundBlur}
+        backgroundGlass={backgroundGlass}
         blurOptions={blurOptions}
         backgroundColor={backgroundColor}
         cornerRadius={cornerRadius}

src/TrueSheet.types.ts

@@ -193,6 +193,16 @@ export type InsetAdjustment =
    */
   | 'never';
 
+/**
+ * iOS 26+ Liquid Glass style.
+ *
+ * - 'regular': Standard glass with luminosity veil for readability (default).
+ * - 'clear': High-transparency glass for media-rich backgrounds.
+ *
+ * @platform ios 26+
+ */
+export type BackgroundGlass = 'regular' | 'clear';
+
 /**
  * Blur style mapped to native values in IOS.
  *
@@ -371,6 +381,15 @@ export interface TrueSheetProps extends ViewProps {
    */
   backgroundBlur?: BackgroundBlur;
 
+  /**
+   * iOS 26+ Liquid Glass style. Ignored when `backgroundColor` or
+   * `backgroundBlur` is set, or on pre-iOS 26 runtimes.
+   *
+   * @platform ios 26+
+   * @default 'regular'
+   */
+  backgroundGlass?: BackgroundGlass;
+
   /**
    * Options for customizing the blur effect.
    * Only applies when `backgroundBlur` is set.

src/fabric/TrueSheetViewNativeComponent.ts

@@ -85,6 +85,10 @@ export interface NativeProps extends ViewProps {
     'none'
   >;
 
+  // iOS 26+ Liquid Glass style. Ignored when backgroundColor or
+  // backgroundBlur is set, or on pre-iOS 26 runtimes.
+  backgroundGlass?: WithDefault<'regular' | 'clear', 'regular'>;
+
   anchor?: WithDefault<'left' | 'center' | 'right', 'center'>;
   anchorOffset?: WithDefault<Double, 16>;
   insetAdjustment?: WithDefault<'automatic' | 'never', 'automatic'>;

src/navigation/types.ts

@@ -132,6 +132,7 @@ export type TrueSheetNavigationSheetProps = Pick<
   | 'dimmed'
   | 'dimmedDetentIndex'
   | 'backgroundBlur'
+  | 'backgroundGlass'
   | 'blurOptions'
   | 'maxContentHeight'
   | 'maxContentWidth'