I'm in Taiwan. I have a bit of a hobby of checking out digital payment systems everywhere I go. I checked out Japan, Macau, Hong Kong, China, Germany, France, the UK, and obviously the US.
The thing that is the most glaring difference between the western countries and the east Asian ones is that in the US and Europe, there is an ultimate goal of try to force people to use e-payment systems to get some kind of regulatory benefit. Therefore people also constantly push back for fear of excess control, and the government tries to mandate it to force only digital payment.
The approach in the Asian countries seems to be the exact opposite. From mpay in Macau, to Suica/Pasmo/PayPay, 街口支付/easycard in Taiwan ....
Most of them had their origin in transit card system(China is different). But they then had a proliferation of QR code payment systems that competed with each other for dominance.
The difference between the east Asian approach and the western one is that the east Asian one never needed to try to ban cash to push for e-payment. It offers so much convenience and other benefits that people don't really think about it in those terms. Want to pay your parking bill? The license plate scanner is connected to the machine at the front. Is privacy compromised? For some parking lots yes, for others no, but the speed of processing is so much better than anything I've seen in Europe.
Nobody is talking about banning cash here or in those other societies, but many people will not use cash, because its too much of a hassle.
EDIT: I guess I don't know enough about the smaller EU states since someone below just mentioned MobilePay.dk
But regardless, there is a level of competition in those Asian e-payment systems that does not seem to exist in "the West"