You don't actually have a problem with big tech or surveillance, you have a problem with the US.
The same has not been proved for China. There have only been accusations by the US government, followed by an absolute reluctance and failure to provide any proof whatsoever.
The US accuses China of being a bad actor engaging in data surveillance, refuses to back up accusations, and then commits the very same act themselves. The very definition of dishonesty and hypocrisy.
https://www.theatlantic.com/international/archive/2013/06/ac...
TikTok almost certainly receives requests from various governments to collect data no differently from Facebook/Google/Verizon etc..
I think it's not a question of if China is doing this as well; certainly they are. No politician is going to publicly say though, "Look we know China is collecting data on you from TikTok because, uh duh, that's what we do with all of your US based social media posts."
I also don't think our government is all that directly concerned that China is monitoring. I think the concern is more on how the data and the outside control of the platform might be used to influence public opinions. Election tampering and the like.
Similarly, the PSBs in some cities have used social media contacts as a means of working out which foreign English teachers to do impromptu drug testing on.