That's what got us in to the current public health emergency. It is a luxury we cannot afford if we are to stand a chance to get out. https://www.bmj.com/content/392/bmj.s125
If the parents don’t see it as an issue then the state should not be forcing its way in, especially considering the harm to privacy and free speech. This is an area where reasonable people can disagree as to what the correct parenting approach is, so the state should not enforce a particular approach. If anything they should focus on making it easier for parents to set their own limits at the device level.
...except when the harm spreads far beyond the family.
"We have reached an inflection point. We are facing nothing short of a societal catastrophe caused by the fact that so many of our children are addicted to social media." says the Lord proposing the UK ban.
When it was a luxury we couldn't afford because of "terrorism" I was doubtful. Now that it's a luxury we cannot afford because of the "public health" effects of teenagers using TikTok, I am starting to struggle to identify a good-faith argument.