What is common thing to handle for ios and android platform in react-native?

I've been building react-native for android at beginning and never been into IOS as I don't have project that use IOS at that moment and I don't own IOS or MacOS. And I'm clueless of what is difference between IOS and Android in general. I'm currently need to develop my app to be able to use by both Android and IOS.

What are the common things that need to be handle? To be exact, check for Platform. From maestral-solutions, it shows on stylesheet that the header height and margin top:-

const styles = StyleSheet.create({
  header: {
    height: Platform.OS === 'android' ? 76 : 100,
    marginTop: Platform.OS === 'ios' ? 0 : 24,
    ...Platform.select({
      ios: { backgroundColor: '#f00', paddingTop: 24},
      android: { backgroundColor: '#00f'}
    }),
    alignItems: 'center',
    justifyContent: 'center'
  },
  text: {
    color: '#fff',
    fontSize: 24
  }
});

Is there any other common things to handle for IOS platform? Like status bar or tab navigation or icon?