I think there’s a pretty strong argument that a pro-corporate tilt doesn’t result in a difference in content promotion regarding Tibet, Tiananmen Square, Hong Kong, and/or Uyghur.
You could argue the US military industrial complex might push South China Sea, pro-Taiwan, pro-Ukraine, and pro-Isreal content; that seems distant enough from (e.g.) Facebook, but I’m not sure how we’d tell. We don’t have a major social media platform in a place like (e.g.) Switzerland to study (granted, the way Proton is expanding they might try).
In any case, I do think it’s pretty damning for TikTok’s claims of independence that China’s direct conflicts, Tiananmen Square and Hong Kong are basically suppressed to the point of being nil (EDIT: Tibet is also a direct conflict of sorts but isn’t talked about as much from what I’ve seen on “western social media” and could be conditionally filtered … there’s still probably a fair bit of “Tibet” content that exists outside of the “bad for the CCP” space).