Need some guide/advise for SaaS -It would be a great help

Hello Everyone!
I’m new to appgyver and I already learnt some basics of appgyver as earlier I’ve done some project on other no-code before.
I’m making an web app(responsive mobile) in which including some main features like already in UBER,Community,B2B market place
I know this is pretty hard to make all these but Are these features is mainly possible or not in appgyver?? mean Is there possibility of implementing??

Some of main features like-:
2.Creating custom repeating group
3.Push notification(One Signal)
4.Firestore Db

It would be a great help if someone advise for the same.
I’ll really appreciate
Thanks :grin: