Slightly missing the point BUT....
Those of you who are adamant your DC doesn't watch TikTok need to have a re-think. They'll have friends who ARE WATCHING, or whose older siblings ARE WATCHING and who will have shown your DC. Or even whose PARENTS are watching!
Could be at school, at a friend's house, at the activities they go to.
Seriously, you cannot be aware of every moment of your child's online interactions. You can ban it at home, not let them have a phone or have access etc but there's A LOT of other kids out there with phones on them all the time and they'll all gather round to watch it. It might not even be a friend, just a kid in a class/activity.
My DC are adult now and often tell me about stuff they did/saw that I had no idea about and we supervised their internet access etc and thought we were getting it 'right'. Most stuff was/is pretty harmless but there's also some awful stuff on there too (suicide, self harm, porn, eating disorders, violence...)
This is such a worrying time to be parenting younger DCs. and I really empathise (and am relieved mine are young adults!)