If don't have any proof why block it then? Is this North Korea?
Anyway, if the US has suspicion of PLA working with TikTok and IMHO the should be suspicious, they can regulate how data is collected or how algorithms work and require mechanism that allows that be verified.
Because you'll never be able to prove it, but the proof is arguably in it's effects... whether it's riling up domestic activists to block naval operations in home ports, messaging your entire userbase in-country to DDoS elected representatives or drive political violence through mis/disinformation . I think the entire western world should unify to push TikTok out and at the very least ban all types of "recommendation" algorithms on foreign and domestic social media applications. Free market economics be damned pull out the regulation stick and go whacking
