A second order effect of this is that a small number of parents have the ability to manage their kids use of tech.
A side effect of that is kids seeing their peers use tech. I’ve seen 9 month babies getting hypnotized by screens.
This is excluding situations with an antagonist preying on the child, such as grooming or bullying.
Yes, in an ideal world, it would all go down to parenting. Since we live in reality, some of that work is shifting to ensuring defaults are in place.
I thought it was a great question. I wish I remembered more details and had the links ready.
No, they aren't in place at all. It's the parents' job and vast majority of parents do it fine. Nobody wants the Nanny state you propagate.