Reminds me of how my parents wouldn't let me watch pokémon after school because they wanted me to do my homework first: so I'd go to my room and take a nap for an hour and tell them I'd done it. Then I was well rested to get up again after they'd gone to sleep and watch adult swim or similar on cartoon network 😂.
I guess some restricted/supervised access to platforms thier friends are on might be a better approach than an all out ban, but idk I don't have kids lol