I think partly because Google and Apple controlled the contactless bits of the phones for many years, the non-OS-makers like WeChat and AliPay made use of the open technology of QR codes. I think theoretically you could build equivalent things as they have with NFC today on those platforms but on the other hand being able to set up a “POS” with nothing more than a printer does have an appeal to it, even if writable nfc stickers cost 5 cents you still have to go buy some.

In Russia they tried to use bluetooth after being sanctioned from using NFC.