Configuration of Drawer, Tabs and Stacks

[Zefau]

I've been trying to setup the boilerplate with a drawer having tabs as well as stacks, but unfortunately failed it and looking for some help.

I'm not able to open the drawer by sliding to the right and I do not get the drawer icon which is usually on the top left.
It shows the tabs though.

My code of the RootScreen looks like:

/*
 * TABS
 */
const TabsNavigator = createMaterialTopTabNavigator(
	{
		Welcome: {
			screen: ExampleScreen
		},
		Story: {
			screen: ExampleScreen
		}
	}
);

/*
 * DRAWER
 */
const DrawerNavigator = createDrawerNavigator(
	{
		Home: {
			screen: TabsNavigator
		},
		Links: {
			screen: ExampleScreen
		},
		Settings: {
			screen: SettingsScreen
		}
	}
);

/*
 * STARTSCREEN
 */
const AppNav = createStackNavigator(
	{
		// Create the application routes here (the key is the route name, the value is the target screen)
		// See https://reactnavigation.org/docs/en/stack-navigator.html#routeconfigs
		SplashScreen: SplashScreen,
		
		// The main application screen is our "ExampleScreen". Feel free to replace it with your
		// own screen and remove the example.
		MainScreen: DrawerNavigator,
	},
	{
		// By default the application will show the splash screen
		initialRouteName: 'SplashScreen',
		
		// See https://reactnavigation.org/docs/en/stack-navigator.html#stacknavigatorconfig
		headerMode: 'none',
	}
)

const App = createAppContainer(AppNav)
class RootScreen extends Component {
  componentDidMount() {
    // Run the startup saga when the application is starting
    this.props.startup()
  }

  render() {
    return (
      <View style={styles.container}>
        <App
          // Initialize the NavigationService (see https://reactnavigation.org/docs/en/navigating-without-navigation-prop.html)
          ref={(navigatorRef) => {
            NavigationService.setTopLevelNavigator(navigatorRef)
          }}
        />
      </View>
    )
  }
}

Any ideas?
I would also much appreciate if this is standard part of the boilerplate.

Thanks,
Zefau

[Zefau]

It was a long way, but I finally figured it out!
The issue with the drawer is solved by https://stackoverflow.com/a/53396072/10249387 (which has also been added to the Getting started at React Navigation (see https://kmagiera.github.io/react-native-gesture-handler/docs/getting-started.html#android).