This, it's the stupid addictive games like Roblox and social media like YouTube. Circling back to schools (not-UK), here even teachers let them play Roblox sometimes in primary school on school hardware. The problem as a parent is that you cannot get upset and fight about everything, you need to pick your battles. This is made worse that you are most likely a minority, most parents will say/think a little Roblox or Tik Tok at school is harmless fun.

IMO the problem is twofold: first, younger kid's brains are not developed enough to deal with games and social media that are intentionally made to be addictive. Heck, even a lot of adults have issues limiting their time. Addictive games and social media should just be forbidden under 16 years. Currently our government has only issued a recommendation, which does nada. Second, teachers and parents need to be educated better. Many have no idea that these addictive apps are an issue or just don't fully realize the damage they do.