App.js

import { useEffect, useState } from 'react';
import { StatusBar } from 'expo-status-bar';
import { StyleSheet, Text, View } from 'react-native';
import * as ScreenOrientation from 'expo-screen-orientation';

export default function App() {
  const [orientation, setOrientation] = useState(1);

  useEffect(() => {
    ScreenOrientation.unlockAsync();
    ScreenOrientation.addOrientationChangeListener(({ orientationInfo }) => {
      console.log('orientationInfo.orientation', orientationInfo.orientation);
      setOrientation(orientationInfo.orientation);
    });

    return () => {
      ScreenOrientation.removeOrientationChangeListeners();
      ScreenOrientation.lockAsync(
        ScreenOrientation.OrientationLock.PORTRAIT_UP
      );
    };
  }, []);

  return (
    <View style={styles.container}>
      <Text>Open up App.js to start working on your app!</Text>
      <StatusBar style='auto' />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#fff',
    alignItems: 'center',
    justifyContent: 'center',
  },
});