To add, McDonalds is required to list calories and nutritional information. There are various agencies and regulations guarding us from them selling us rat meat instead of cow. Education on “junk food” is widespread and has (had…) widespread government education programs.

There is a great deal of information given to parents on what is in McDonalds.

I would say that most parents, not those on a tech site, have no idea how tiktok works, what studies have shown about it or its dangers.

I agree, there's plenty of information out there and nutrition is often taught in schools.

Additionally, other content like TV and movies has content ratings, social media does not have anything of the sort.