These apps will only be banned in the USA, that is not the western world. The issue is these apps are permitted in the USA and have been running for years until some kids made a fool out the current US president. They are not even being looked at in the developed world as threats, why is anyone going to care even if that data does get to China, we already know the USA harvested far more dangerous personal data than what you had for lunch.
As for what China allows and disallows, remember they don't claim to be a free market. China is a controlled market that has slowly been opening up to allowing its citizens to doing more(such has owning businesses). If you are judging the USA based on China that is a low bar to set. Just the USA it's peers in the EU or even Canada, New Zealand, and Australia.