Re: I wonder who asked for this
Have you been to China? Using facial recognition for payment authorisation is not uncommon in shops kitted out with the relevent point of sale equipment.
They might not have asked for it, but its there, and it does get used, although I think it hit considerable problems with the masks the mandate for which were not removed earlier this year.
QR codes are still the main way to pay, but biometrics are there and are being used for day to day payments.