How to change the color of the line which seperates the bottom tab and the content of my screen? React Native Tab navigator

I have a react native app and want to change the color of the seperator from my bottom tab navigator. Also can I set the background color somehow to transparent. Right now I set it to the same color as my background.

I want to change the white seperator line

export default function App() {
  let [fontsLoaded] = useFonts({
    'Inter-Light': require('./assets/fonts/Inter-Light.ttf'),
    'Inter-Regular': require('./assets/fonts/Inter-Regular.ttf'),
    'Inter-Medium': require('./assets/fonts/Inter-Medium.ttf'),
    'Inter-SemiBold': require('./assets/fonts/Inter-SemiBold.ttf'),
    'Inter-Bold': require('./assets/fonts/Inter-Bold.ttf'),
    // Weitere Schriftarten hier registrieren
  });

  if (!fontsLoaded) {
    return <Text>Error While Loading fonts</Text>;
  }
  
  return (
    <ThemeProvider>
      <NavigationContainer>
        <Tab.Navigator
          screenOptions={({ route }) => ({
            headerShown: false,
            tabBarStyle: { backgroundColor: route.name === 'Home' ? useTheme().theme.colors.background : 'YOUR_TAB_BAR_BACKGROUND_COLOR'},
            tabBarActiveTintColor: route.name === 'Home' ? useTheme().theme.colors.blue : 'YOUR_INACTIVE_TAB_COLOR',
            tabBarInactiveTintColor: 'white', 
            tabBarShowLabel: false, // Um die Tab Labels auszublenden
            //tabBarIndicatorStyle: { backgroundColor: 'black' }, // Hier kannst du die Farbe des Strichs unter dem aktiven Tab ändern
            tabBarSeparatorStyle: { backgroundColor: 'green' }, // Hier kannst du die Farbe des Trennstrichs oben an der Tab-Bar ändern
          })}
        >
          <Tab.Screen name="Home" component={HomeScreen} />
          <Tab.Screen name="Details" component={DetailScreen} />
        </Tab.Navigator>
      </NavigationContainer>
    </ThemeProvider>
  );
}

I tried with

tabBarSeparatorStyle: { backgroundColor: 'green' } 

but this doesnt work

While there's no direct prop for setting the tab bar background entirely transparent, you can achieve a similar effect with a combination of styles:

screenOptions={({ route }) => ({
    headerShown: false,
    tabBarStyle: {
    backgroundColor: 'transparent', // Set transparent background
    borderTopWidth: 0, // Remove default top border
    position: 'absolute', // Optional for more control
   },
 // ... other styles
})}