I'm doubtful browser vendors could ever properly encapsulate the various international payment use cases behind their abstraction, but I would love to be proven wrong.
Bank accounts (ACH/SEPA), EU's relatively recent push for MFA for credit card transactions, India's mandate overall for MFA, China's gov't regulations around customer payment data not leaving the GCF, validation of China Union Pay cards in North America, etc., are all complex instruments/workflows that are no small feat to handle and handle well.
Bank accounts (ACH/SEPA), EU's relatively recent push for MFA for credit card transactions, India's mandate overall for MFA, China's gov't regulations around customer payment data not leaving the GCF, validation of China Union Pay cards in North America, etc., are all complex instruments/workflows that are no small feat to handle and handle well.