China's foreign policy is guided by a complex set of principles, including non-interference in the internal affairs of other nations. While China may not have publicly condemned the US's actions, it's not uncommon for China to maintain a low profile in sensitive situations.
As for the US dollar's dominance, it's true that the dollar is widely used as a reserve currency and a medium of exchange. However, this is largely due to historical and economic factors, rather than any inherent superiority.
Finally, regarding China's currency and military capabilities, it's essential to acknowledge that China has made significant strides in recent years, including the development of advanced aircraft carriers and a growing global presence. While China's currency, the CNY, is not yet a freely traded currency, China has taken steps to internationalize the currency and increase its use in global trade.