Map through firebase firestore collectiongroup, Not working

const [theposts, setThePosts] = useState([]);

const myPosts = query(collectionGroup(db, 'posts'));
const unsub = onSnapshot(myPosts, (querySnapshot) => {
  querySnapshot.forEach((doc) => setThePosts({
    post: doc.data()
  }))
  return unsub;
})

const Posts = theposts.post;

return (
<>
  <StatusBar barStyle = "dark-content" backgroundColor = {'#b300b3'} />
  <SafeAreaView style={[styles.container, {marginTop: 5}]}>
  <Header navigation = {navigation} />
  <Stories />
  <ScrollView>
  {Posts.map((post, index) => (
  <Post post={post} key = {index} />
  ))}
  </ScrollView> 
    { /* <BottomTabs icons={bottomTabsIcons} /> */ }
  </SafeAreaView> 
  </>
)