At a certain age they will make that decision for themselves - you can't micromanage or monitor your kids' activities all the time. It's the same in every generation, it was TV at one point, then games, then youtube, then tiktok, and I'm sure the next generation in 10 years or so will scoff at whatever the younger generation does to get their distraction / dopamine hits.

That said, in the Netherlands there's been a ton of schools that have banned phones on the premises for various reasons. It's IMO ineffective as long as they also get laptops or tablets from the school, but it's a step in the right direction. There was just too much distraction and abuse; in a local example, there were anonymous "gossip" accounts on the various social media that would record and publish loads of random shit happening at school, often leading to cyberbullying and whatnot.