Caporegime
Exactly. My daughters phone can’t install any app without my (or my wife’s) permission. She can only access certain apps outside of the dedicated screen time hours, and communication is restricted to trusted contacts.
That is the fine line and how far do you go? If you suppress too much you end up with a child that goes off the rails later down the line.
My daughter is a teenager and we like to give her a bit of independence within reason. You don't let them use the apps like her friends do they just end up becoming social outcasts.
I have known girls through my daughter like you mentioned who have ended up getting "burner" phones from school friends because of how much control they are having put on them.