Database using Google firebase / firestore -- 2

I currently have a website and firebase database: Step 1) Shararable link which shares the page with specific post, total number of shared times Step 2) Emoji interaction count (if 0 collapse div box column, if > 0 show div box column), total number of interactions. Step 3) Check author pic is always logged in user for commenting on posts. Step 4) Add photo upload to to sponsored post, connect sponsored post to sponsored menu in news feed. Step 5) Display logged in users who are online, last online (min ago, hrs ago, days ago). Step 6) Variable for total number of notifications on site, display varaible as text in realtime. Step 7) Add Friend list, remove friend recommendation from list, send friend request. display friend requests. Step 8) Form submission for marketplace ad (I think this is pretty much the same code as create ad), connnect item to marketplace feed, display item data once clicked. Step 9) Upload 6 photos max, load on page without refreshing, collect whether user agreed to terms and conditions. Step 10) Matchline list Step 11) Display logged in user profile, editable bio Step 12) 4 types of button (like, pass, 10, sugar), depending on which button clicked display profile in different feed (matches, passed, total 10, sugar) Step 13) Match contacts, most recent message at top of feed, realtime without page refresh Step 14) Messenger, time of message, day of message if > 24 hrs ago Step 15) Match average rating calculation Step 16) Realtime user is typing a message Step 17) New message notification, number of messages new, realtime without page refresh