The IMF is not a central bank. Not sure why you are even mentioning it here, it has no place in a debate about reserve currencies since the SDR is just a reserve asset that can suplement its members, if it would not hold Remninbi with China as a member that would be quite peculiar.
What is a good indicator is central bank reserves. The Remninbi only accounts for 3% of global central bank reserves versus 60% for the dollar and 20% for the euro:
The renminbi's unconventional route to reserve currency status.
China's financial system is less developed, its currency is not fully convertible due to capital controls, and it lacks true rule of law.
It has no significant offshore market (the Euro has 12x the amount of offshore deposits compared to China's currency).
If China does not want to liberalise its capital account its only way to the top would be through holding a lot of dollars, creating a multi-polar system of US/CN currency dominance. There is no path right now that goes to the Yuan taking over the world without also bolstering the dollar.
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The current narrative about how the Remninbi is a threat to dollar-dominance is thus largely overblown. Remember that a reserve currency is different than a trade currency (CIPS increases trade and invoicing, not role as reserve).
I am sure the Remninbi will keep growing as a trade currency over the coming decades. Reserve currency, maybe, if they play their cards right. Right now it is definitely NOT a global reserve currency nor is it moving to be that way by a significant degree apart from the development of CBDCs.