I think EU system wont never be extended, because EU take USA orders.
In one decade maybe whole world will be using Chinese payment systems.
China is shy and subtle.
e-CNY app (electronic renminbi) seems to was available outside China when they launched 2 years ago, but currently it's only available to use in China in "Pilot mode". They are doing tests, tries. They must know very well how bad USA can take that. But definitely they are moving in that direction.
Here in Spain you can see UnionPay cards accepted in a lot of stores/atm, more than 90% supported, and almost nobody knows what is UnionPay, because Spanish banks dont give UnionPay cards, it's only for the 300k people of Chinese diaspora in Spain.
Interesting to know Russia/Iran have reciprocal agreements about MIR and Shetab. But just three countries couldn't change the world. I dont think it would be possible in BRICS neither. But China will change the world, someday.