On WeChat and Douyin (chinese tiktok), good luck mentioning things like:
the cultural revolution famine the great leap forward Taiwanese independence Hong Kong self governance democracy human rights Falun Gong Uyghur people free speech KMT party Chiang Kai-shek
and that's just off the top of my head. there are likely hundreds of others.
But did this apply to the US version of TikTok? We now have imposed censorship in the US app, that as far as I'm aware did not exist at all when it was owned by China.