TikTok has a lot of CCP propaganda in it (fake influencers paid by the CCP). It's not just a happy place to see cute dance videos.
This goes into some of said propaganda in it, and how they have more "soft" propaganda in the US version of TikTok vs more intense propaganda in the Chinese version of the app: https://www.youtube.com/watch?v=3aYCG4vEe5s