Maybe most of these regulations already come with these restrictions, but in my view social media apps that cater to under-16 can operate if:

- they dont offer an "algorithmic" feed - underage can only see content from who they follow and, most importantly

- photographs NOT allowed.

I bet 90% of social issues with "social media" disappears if these tools go back to 1990s style internet

Lots of photos on 1990s internet. Everything has a camera these days.