Why can't steganography be used on top on the Chinese government endorsed app (WeChat)? It wouldn't have to use images, it could use any data in the system or

Why can't steganography be used on top on the Chinese government endorsed app (WeChat)? It wouldn't have to use images, it could use any data in the system or even spread it amount mutilple apps within WeChat. By the way, a couple suggestions if you haven't used WeChat: 1) There is a really nice, canonical one pager out there for explaining WeChat to Americans, I highly recommended it. 2) Its important to note that WeChat despite its name, is miles away from being a simple chat app. It's an entire platform, almost OS like, complete with its own apps within an app. Their platform is incredibly rich, to the point that any significant business has some services available or at least a presence. Before going to China on business I hadn't heard much about it, and only knew it existed because of some Chinese friends. However if you are planning a trip to China, go ahead an install it now because it's ubiquitous. There is an English version and last time I checked it was reasonably up to date, although seemed to be missing a few features.