How can I convert Web 8 version to Web 9 in Firebased

Question

import firebase from 'firebase/compat/app';
import React , {useState} from 'react'
import { EmojiIcon, GIFIcon, ImageIcon, PollIcon, ScheduleIcon } from '../icons/Icon'
import db from '../firebase';
import { collection } from 'firebase/firestore';


const TweetBox = () => {

const [content, setContent] = useState('');

const sendTweet = () => {
if (content !== '') {
  collection(db,'feed').add({
    displayName: 'Talha',
    userName: '@talhayavcin8',
    content,
    timestamp: firebase.firestore.FieldValue.serverTimestamp(),
    avatar: 'https://pbs.twimg.com/profile_images/1471200875414790152/P4ESp6xE_400x400.jpg',
  });

  setContent('');
 }
};

I have a problem with Firebase in my Twitter clone app. How can I convert this to web 9 version?