The bigger deal (bigger than the tracking that people usually focus on) might be how the algorithm is specifically tuned to reward dumb content in the US, compared to rewarding STEM and other educational content in China. One minute video that explains: https://www.youtube.com/watch?v=Hus9fWz0RRk Further reading: https://www.opindia.com/2022/07/tiktok-china-engineering-oth...
The US doesn't reward factual programming, that's why the History Channel turned into the Ancient Aliens Channel.
Interest in drier, more educational content is less for every human society I know of.