Spacing before and after a horizontal FlatList (React Native)

I'm trying to create a horizontal FlatList that has some spacing around it. I was able to get the beginning spacing correct with paddingLeft on the list, but paddingRight on the list doesn't seem to put any space after it (if I scroll all the way to the end, the last item is pressed right against the border).

Here is a Snack so that you can run and try this out live: https://snack.expo.io/@saadq/aW50cm

And here is my code:

import * as React from 'react';import { Text, View, FlatList, StyleSheet } from 'react-native';const data = [{ key: 1 }, { key: 2 }, { key: 3 }, { key: 4 }];class App extends React.Component {  render() {    return (<View style={styles.container}><FlatList          style={styles.flatList}          horizontal          data={data}          renderItem={() => (<View style={styles.box}><Text>Box</Text></View>          )}        /></View>    );  }}const styles = StyleSheet.create({  container: {    flex: 1,    justifyContent: 'center',  },  flatList: {    marginTop: 100,    paddingLeft: 15,    paddingRight: 15, // THIS DOESN'T SEEM TO BE WORKING    // marginRight: 15   I can't use marginRight because it cuts off the box with whitespace  },  box: {    display: 'flex',    justifyContent: 'center',    alignItems: 'center',    height: 50,    width: 100,    borderWidth: 1,    borderColor: 'black',    paddingHorizontal: 15,    marginRight: 15,  },});export default App;

Using marginRight instead of paddingRight does seem to give the expected spacing result, however it causes a different issue where that whitespace is ALWAYS there and cuts off the items when scrolling.