This is quite expected since those two big business companies are still USA-based and they do not want to create a bad impression with the government that they are cooperating with China. Anyway, the success of this so-called digital yuan of China is not resting on foreign-based corporations but on its very own land and people itself. This is supposed to be supplementing (that is, for now) the paper money of China, with the aim of course of later on possibly replacing the dominance of USA Dollar in global commerce, especially those dealing with the growing China business. Soon, we can also have a digital USA Dollar, so at the end there can be a sort of balancing in the marketplace.