Not sure if you're aware of the fact of what was going on in Hong Kong and the loss of its autonomous status due to the national security law. Facebook and TikTok are no different to privacy, but TikTok can give all of that data and the CCP can access it. But of course it doesn't matter to you because 'its pretty harmless'.

For Hong Kong citizens, it's much worse. They are being identified and arrested in the hundreds as the Chinese government has access to this data to find anyone insulting or ridiculing them. That's very totalitarian to me.