I should add, compared to those other countries.
Not that a US Dollar doesn’t have problem.s
Almost every country has currency problems except a few of the gulf states. You can take a collection of relatively poor countries per capita and pool their currency into one - it’s still a collection of poor countries trying to trade with each other. Might as well trade silk for spices. China and maybe Russia will come out OK from it, the others much less so.
So, China can now buy oil in Yuan. This makes sense for the GCC countries because they are spending more in China.
The dollar is the best looking horse in the glue factory.