it's been pushed on lemmy as well, but maybe indirectly. nobody of the people who push it seems to know why tiktok really gets banned or they are obfuscating it.
tiktok has(d) developed into a hivemind where tens of millions of people (or more?) can be a part of a discussion. This made it easy for trends to spread rapidly, such as deciding where to migrate with the impending tiktok ban. From my own experience on tiktok, the last few weeks there was much discussion of where to go, and it appears the hivemind settled on rednote.
To specially tell the government "fuck you" it was sought after because of it also being a Chinese app and it's more of a deep state kind of app really regulated by the government. It's name comes from some red notebook that dude running the country is often seen carrying.
Tiktok itself isn't pushing it the creators are. Plenty of them getting banned though as the rules are strict.
Anything owned by major companies such as meta people don't wanna be apart of. What they claim tiktok is doing they are doing worse