The issue is (as far as I know) the CCP has unfettered access to Chinese apps. On the other hand, the US government has to ask. While Google, MS, Apple, etc have all said "yes" plenty of times, they also have said "no" and are doing so more frequently as public opinion is changing on privacy. Literally the ability to say no is a big difference.

If I am wrong about the unfettered access, let me know.