Whatever your last phone was that you stashed in the drawer when you got your latest?
Just about to update my 13yos pixel3 to my wife’s ‘old’ pixel4a. 12yo is on a 4a that I picked up used off here. Hadn’t upgraded my phone when he was due a more reliable phone than the moto g3 they both stated with.
Keep in your own ecosystem and as above, family link or apples equivalent.
Family link will let you shut down everything and anything..put it on a schedule, limit screen and app time, have you approve any apps, locate your kid, etc etc
It’s very good but my kids do resent me when I drop the banhammer when they push the limits or are typical Wally’s.