In case you havent noticed, the US dollars has in the last couple years completely decoupled from function and utility of a currency, much less a global reserve currency at that. Many have already pointed out, which you choose to actively ignore or brush aside, US dollars are being created at exponential rate which cannot possibly be sustained. This is the basic math of compound exponential curves. Since modern money is really just an abstract symbolic token meant to represent a deposit of energy and that resource's thermodynamic entropic ability to do physical work etc and since the global peak energy production hit during the end of 2019 (with convention high EROEI having maxed out during 2008) and global EROEI is rapidly diminishing, its clear that we are now in a Fractional Reserve Energy Economy where there are much more dollars out there than can find, bind or otherwise pair with real energy deposits to effectuate the work needed to actualize the value and purchasing power of said dollar.
The dollar is already dead, this is why QE is hitting back in the homeland with "transitory inflation" now... America's structural inability to deal with lower EROEI threshold is why even as it prints to infinity it still entered a recession while denying the obvious, you can con the world for a while but you cant trick the 2nd law of thermodynamics in the long run
China is not playing this game anymore... In the age of 5G/6G and the era of the post-blockchain, money has become like everything else "software defined" and programmatic... what did you think the digital e-Yuan was about? Or BRI and bilateral trade or Xi meeting with SA next week? PPP GDP China is by far the largest real economy in the entire history of the world as well as by far the largest global trade partner with the most nations in the world. Its now breaking free of US chip semiconductor containment as well as securing its energy needs from various sources. So you are Alibaba who had always defaulted to using VISA for payments on your ecommerce site but then one day VISA decides to build its own ecommerce store but instead of competing fairly it tries to kill off Alibaba by blocking it from using VISA thinking Alibaba will just go into a corner and die and VISA will get all that customer base overnight, instead what really happens is Alibaba announces the very next morning that it had been already working on Alipay and that henceforth going forwards VISA will never be accepted again
There is no need to use the US dollar at all... China invented paper currency but its next implementation will topple the current "financial hegemon" as you seem to put it. You shall see in 18 months time or sooner give or take a couple months