Easy methods to begin React Native App in portrait orientation solely in each iOS and Android?

I wish to begin React Native app with Portrait orientation. Presently I am utilizing the react-native-orientation-locker library to deal with the preliminary orientation. Nevertheless it’s not working accurately.

My App.js appears to be like like this.

import Orientation from 'react-native-orientation-locker';

export const App = () => {
    useLayoutEffect(() => {
        Orientation.lockToPortrait();
    }, []);

    return (
        <RootContainer>
            <MyApp />
        </RootContainer>
    );
};

export default App;

I feel this must be dealt with from the native aspect as a result of the JavaScript codes run after the preliminary course of. Possibly I’ve so as to add a code MainApplication.java and AppDelegate.mm?