One thing I noticed that is often missing in these discussions, sometimes it isn't up to the parents to decide at all.
Imagine your 8 - 11 years old daughter's social circle, and the school she is at where her classmate were allowed very little Internet at home or school. Then you wouldn't have a problem enforcing whatever internet rules.
Now imagine everyone of her classmate were playing Minecraft, and she is the only one being left out.
The point is, if everyone at her school is spending time on god damn stupid Chinese TikTok, then a 10 - 15 minutes Tik Tok for her would be a necessary evil.
So far most of the Internet stuff are entertainment only. So stuff like Pop Music, Anime, Viral Videos etc. While not productive, they are harmless. And educating them not to use real names and talk to strangers on the internet seems to have worked so far. And only keep track of topics they looked into. ( At least before the age of 12 or 14 ) Generally speaking the internet is still fairly safe under some guidance.
But I have witness teenagers ( son of my close friend ) wondered into politics and culture war at the age of 14+. And it is absolutely destructive. The age where they start doing things without telling you, and going on to Reddit or whatever Internet forums. I dont have a good solution to that.
Part of the reason why I have been thinking about Age restricted participation on web forums. You could only reply if you are over the age of X.