Build a partial backend function

I need a partial backend function quickly done for a project .. the only thing i need is backend system for posts (which will include posts , comments , likes , emojis ) ..

Function that need to be build for backend
Create / delete / edit post
create / delete / edit comments to post
likes to posts..
emoji likes to post


I already have backend with users sessions and all ( you don't need to develop it but use a generic to show how it above functions works)

Backend stack used / required

Nodejs
express
typescript
Apollo server
typeorm
graphql
redis
postgres