Hey, thanks a lot!)

Supabase can work with nest.js, as it is just postgres at its core.
You can use supabase-js client on the server-side, there are community driven package for auth https://github.com/hiro1107/nestjs-supabase-auth, and an example repo https://github.com/andriishupta/nestjs-supabase-setup
I would also use storage within supabase to simplify if it is possible.

I didn’t get the part about managing AWS connection, but i guess it would be possible to manage aws resources with edge functions or pgnet extensions + postgres functions.