This is good for leveling the playing field. If Facebook, X, Instagram, WhatsApp, YouTube, etc. are banned/blocked in the PRC, the US should reciprocally return the favor.
China requires all social media apps there to implement government directed censorship and to help ID people who post things on forbidden topics. That's not a nice playing field to play on, but it is a level one because it does apply regardless of app origin.
... creating a massive pressure for sideloading and alternative/non-official app-stores. Don't for a minute think that those millions of people who currently enjoy that platform will suddently want to stop. Necessity is the mother of invention.
(No, personally I don't use TikTok, YouTube or any other cat video sites. I'm not in that demographic)