This article totally misses that the dominance of a given currency as a reserve currency is based on politics not economics. Hypothetical: when Saudi and UAE induce OPEC+ to require their oil to be paid for in Yuan, then Central banks around the world will trade dollars for Yuan without hesitation. This would thus hinge on a political decision by OPEC. Not saying it will happen tomorrow. But by next year it might.
People in OPEC countries want stuff.
Most stuff is made in China.