I’d say that China is not that interested in armaments sales, as the West has been for decades.
On the day the fighting stops, China will be the only means of rapidly rebuilding the entire Gulf at once. That leverage will affect everything from yuan-denominated oil to longterm hydrocarbons & basic chemicals supply contracts.
The US won’t spend a $ as they focus on pulling out. China will clean up for the long term with most of the Gulf (but not KSA) as client states.