China also spends its reserves to massively financially de-risk from the US, and invest in significant quantities of copper, oil, nickel, iron, and everything that isn't US treasuries, not just gold, since they have excess capital they need to invest somewhere (BRI lending also grew big-time in 2023). In general, everyone is de-dollarizing rapidly in many ways.
Currency/trade wars, economic isolationism, and resource accumulation like the ones happening nowadays globally were historical preludes to many big-time wars, signifying periods of instability, between the old hegemon dying, and new powers appearing.
Generally, countries around the world could 'tolerate' the US's aggressive hegemony over them, in return for global economic and international prosperity and stability, but now that that isn't the case anymore, there is no reason to 'tolerate' the US anymore.
It is time to move to someone else, who is capable of once again resetting the global world order back to stability and growth both geopolitically, and economically (won't cause wars everywhere around the world, instability, that all slows down global GDP growth, etc).
In my opinion, that is clearly China, which has proven to be a much smarter, more peaceful, and more stable superpower. In fact, it exports deflation, instead of inflation like the US. It boosts global standards of living instead of decreasing it at the current time.
And instead of sucking up capital from around the world, as the US does, it exports it and invests massively in developing other countries, etc. Therefore, I don't think that anyone would truly "miss" US after they are gone, as they delusionally and arrogantly believe.
Everything will just return to the better version of the current reality the next day they are gone, although there will be some short-term pain, but overall long-term gain and a way better version of the world.