I think you oversimplify the situation, it is actually important to look at things on a case-by-case basis, reciprocity is very complicated. Facebook was banned in China following the Urumqi Riots in 2009, which led to 200 deaths and many more injured. The protests that turned violent were largely organized via Facebook, and the company denied giving out details about the organizers. Not cooperating with law enforcement got them banned.
Similarly, Google did not want to enforce Chinese censorship in their search engine, so their services were slowly banned, too.
Both companies do follow censorship laws in other countries, like Germany, albeit much more reasonable ones. These are laws that chinese companies must follow, too, but western companies couldn't justify it to their employees, investors and governments, so they pulled out. TikTok would probably be fine with handing over protester data to the FBI if asked.
A larger point to press the Chinese on when it comes to economic access are forced joint ventures, which have for example been largely abolished for the EU and are generally receding in importance.
Another issue is IP theft, and a court system that (according to some) favors Chinese companies over foreign ones. However, instead of trying to change how China treats our companies, the new way seems to be to just trying to reduce access of chinese companies. The bans of Huawei for example are actually discriminatory, and the idea that TikTok must be sold to be allowed to continue to operate was pretty outrageous. Biden seems to continue with Trumps policies in that regard, but with a much softer touch.