Every country imposes requirements on manufacturers of devices or service providers that some person(s) might object to.
If you choose to do business in that country, you play ball, or you leave. How you pick which ones that are tolerable enough to live with is the question -- and don't imagine that it's moral principles that define it. It's how much a company wants to stomach the loss of that business.
Saudi Arabia (and many others) prevent the installation of Whats App, etc. on phones activated there.
Israel (and the US by the way) censor imagery of certain places on the maps shown in those countries.
Japan for chrissake even forces devices to emit a camera shutter sound when a picture is taken.
And you're singling out China for censoring the Taiwan flag emoji?
How about those other cases? Where does it start / end? Are you saying engineers should quit over every one of these infringements?