There's no been proof that Tik Tok sends all the data to China or that China manipulates the algorithm. In fact, to appease the US before, they agreed to let Oracle and a purely US subsidiary look at all their code and data and content moderation. Oracle would spot check the data flows and where it goes. Tik Tok would report to Committee on Foreign Investment in the US on everything, even hiring practices. And a 2021 study found Tik Tok didn't really collect data beyond the norm of other players in the industry, or beyond what it said it did in it's policy.

Most of the claims by a Tik Tok whistleblower that alleged otherwise seem to be from one guy mad at being fired who's made wild claims, like Merrick Garland instigated his firing, and he only worked there for 6 months.

All this scaring is literally just because politicians are scared that people in Gaza can use it to report what's happening to themselves during the genocide, without the blatant censorship of American companies on the issue. Even Romney admitted that's the reason. I don't actually use Tik Tok and I think it's algorithms are bad for our ADHD addled brains, but I would also apply that to YouTube shorts and Instagram stories. They should all be regulated, not banned. Hell, we actually could use more foreign companies that aren't vulnerable to US censorship, not the opposite. This is especially important since reporters aren't being let in Gaza and the ones who are are killed. And we'll probably lose it once they finish their restructuring in Project Texas, although sounds like they'll be banned before they do.