China bans platforms because they give access to information that embarrasses those in power. The US, here, is planning to ban a platform because it's a propaganda vector, and because its popularity has gotten to a point where we - as a society - at a serious risk of propaganda campaigns. All the information on TikTok is still available elsewhere - but we mitigate the opportunity for the Chinese Communist Party to mold what information is serviced to our constituents, and how that information is shaped.
I just don't think those two are the same.