My own belief is that all social media is a cancer, and to be avoided entirely. I’m able to do that for myself, but I’m also realistic about the chances of keeping my kids away from it. So, I focus my energy on trying to equip them with the mental skills to neutralise the toxic aspects of social media.
For my 9yo, that means teaching her to employ natural skepticism and critical thinking. I’m also trying to drum into her the understanding that social media is inherently untrustworthy and unreliable, and exists solely for the benefit of the corporations that run it.
That said, I’ve blocked Tik Tok on my home network, much to the older kids’ chagrin. They have to use mobile data if they want to access that shit on their phones.