Many of these "social" media websites increasingly just fling AI-generated disturbing videos at people. I am sure we could build a web that is actually pleasant to use for kids, but we are not building it. youtube for example: https://x.com/kimmonismus/status/2006013682472669589
Not sure why you think this has anything to do with children other than in name.
It’s ID verification.
This has been going on since well before COVID:
This must kill that platform.
If we did build it and it became popular, it would quickly be taken over by the same forces that are destroying the current internet. To get good social media sites (and a better internet as well), you would first have to change the economics of the entire system driving these forces. But as is said "It's easier to imagine the end of the world than the end of capitalism".
From my experience as a kid
"Pleasant for kids to use is the polar opposite of kids finding it a pleasure to use"