I am on the exact same boat as you. 9yo daughter keeps asking to download a bunch of crap with in app purchases or ads. The problem is that there's so much crap for mobile. I almost never play anything on my phone, but her at her age and the current times of short attention span being bored for longer than a second seems.like a taboo, she needs to have stuff on her phone, even though we have a Switch at home with loads of good quality games.
It's just the way it is.
That makes sense