This may help explain ~

How much of the trade using Yuan is even recorded by US proxy institutions like the IMF?

Russia is now dependent upon China both as a buyer of its oil and gas and as a supplier of manufactured goods and as a facilitator of payments for these trades. Russia is now providing China with nuclear submarine technology. India and Russia have a long standing mutual trade role so with Russia now dependent upon China India is also drawn into Chinas sphere. India is not a focused economy or political entity - it is more preoccupied with its own internal problems and tension with Pakistan than being capable of wider power projection let alone strategically significant international trade.

China does not need the explicit support of other economies it is rather the converse- all nations need trade with China or they will suffer significant economic loss.

China is incrementally reverse engineering the global monetary system, via the portal through which the west originally imposed its hegemony, Hong Kong. It may take some time but it is already in progress.

Certainly China is in no hurry to see the transition as a gradual transition is less likely to be disruptive but it has to be noted that China and the US are currently at war, by proxy, in multiple locations across Ukraine and the middle east. Chinas demonstration that it can support Iran and Russia even when they have been sanctioned by the mighty US, and that Iran and Russia can still engage in significant and ongoing attacks on US allies does not go un-noticed, except among those who do not wish to see.