Multi list choice

Hey Gliders,
I am making an event app
So I need Q/A & comments sub tab like in the pic so users can click to what they want to see.
I though using choice with visibility on list will work but users can spam it and my updates quota will be eaten up.
Any other ideas or ways I can come up ?

Will the users log in at all? I don’t have any immediate thoughts, but are the sections too long that you have to break it into two?

Yeah @ThinhDinh,
We have around 400 attendees that will use it.

We want to break it so, the questions can be visible to the presenters to answer, I added upvotes (Might remove it, due to updates quota)

Went to community if someone is facing same like, & found feature request that can solve my problem