How can you judge and say it is incorrect, if you don’t actually know all details? Your opinion is not much more correct. What you probably mean is, I should not spread info that is not proven to be correct.
They are not sending data to China, they are sending it to Singapore.
but nothing has been proven (not saying it won’t be, but we can’t operate on speculation)
If it’s not proven, then you are speculating that China does not get the data as well. If that was correct what you are saying, then the US government would not ban Tik Tok. Especially you follow up with a statement
China can get “all the data from US citizens” outside of TikTok.
which is probably harder and more complicated than just getting it from Tik Tok. ByteDance is a company for collecting information, so its right in the hands of China.