Right now the drive to diversify is entirely political.
Ok great you hate Trump, congrats.
The FACT is that there is no serious alternative to the USD as a reserve currency.
The currencies mentioned (euro, yuan) are indeed probably the closest in a basically empty field.
The yuan is controlled by a deeply dishonest tyrannical government that hasn't authentically reported financial information for decades. The EU is an anti democratic talking shop that can't manage to stand up a coast guard, much less manage a monetary policy.
Don't get me wrong, there are major, major issues with how the US handles economics. Inter party vacillations every 4 years. Dishonesty about inflation or economic data when it's politically inconvenient. But to the point of real-world contexts critical to underpin faith in a currency, the US remains economically dominant, more militarily secure than all others, and well supplied with food, water, oil, and raw materials.