If westerm governments are so opposed to a coin managed by private company, imagine how would they react to digital yuan coin - I'm 100% sure it would be banned there, exchanges wouldn't be allowed to list it, businesses won't be allowed to use it, funds won't be allowed to invest in it (or it will be very limited).
I think there is a difference though, China is a country that is becoming the world's leading economic power, while Facebook is still just one private company with an idea it wants to monetize. I'm pretty sure China could convince some other countries, first of all, I think of Russia and some other traditional allies to accept their digital currency.
It should be remembered that China is a market of 1.4 billion people and that the influence of the USA is increasingly weakened by a very aggressive free trade policy between countries. If the US dollar loses its world domination, things are likely to turn around in favor of China, and I believe that most Asian countries and Europe will still choose prosperity and free trade rather than weakening their economies by participating in trade wars.