add docs

Author: johankasperi

docs/docs/docs/guides/standalone-usage.md

@@ -200,6 +200,14 @@ Color of tab indicator.
 
 - Type: `ColorValue`
 
+#### `renderBottomAccessoryView` <Badge text="iOS" type="info" />
+
+Function that returns a React element to render as [bottom accessory](https://developer.apple.com/documentation/uikit/uitabbarcontroller/bottomaccessory).
+
+:::note
+This feature requires iOS 26.0 or later and is only available on iOS. On older versions, this prop is ignored.
+:::
+
 ### Route Configuration
 
 Each route in the `routes` array can have the following properties:

docs/docs/docs/guides/usage-with-react-navigation.mdx

@@ -216,7 +216,13 @@ function MyTabs() {
   );
 }
 ```
+#### `renderBottomAccessoryView` <Badge text="iOS" type="info" />
 
+Function that returns a React element to render as [bottom accessory](https://developer.apple.com/documentation/uikit/uitabbarcontroller/bottomaccessory).
+
+:::note
+This feature requires iOS 26.0 or later and is only available on iOS. On older versions, this prop is ignored.
+:::
 
 ### Options