That cannot be literally required, at least not for anything important because it’s not possible to assume/ensure that every person has one and that it is fully operational etc

哈哈哈. You can go months in China without seeing a RMB, like 90% of businesses only accept Alipay, Wechat, and Unionpay.

The level of enshittification of wechat and alipay is suprisingly low for now, but most Chinese phones are getting harder to flash a custom rom on, presumably to stop resellers from flashing global firmware and reselling in more expensive countries.