Does the ISO 20022 standard work at the caaa (Card Acceptor - Acquirer) level? If not, what works?

Question

Payment cards

Hello,
Question for the experts. What standard is used today to exchange data between the payment gateway (Payment Gateway, aka Payment Service Provider, aka Card Acceptor) and the acquier bank (Acquier)? I see that in many countries the ISO 20022 standard has been adapted, but more at the level of SWIFT and interbank data exchange. Does this standard work for cards (specifically caaa messages)?
Thank you very much in advance.

Answer 1

Within the country