This is the one area that I lean Libertarian.
It isn't the governments responsibility to police social media for anything other than potential terror threats. If your kids are spending too much time on social media, that's something you should deal with. If you don't like the content they see, again put blockers on the apps.
The idea that China is using TikTok to dumb down our populace as a way to make us weaker is kind of a hard sell to me, our populace is already dumb enough, they don't need TikTok to help that.
If anything I think I believe this is more of a way for those in power to stop Gen Z from organizing as TikTok has been the predominate way they have been doing that.