The company has been working on the new feature since around 2020, when it paid about $100 million for a Canadian startup called Mobeewave that developed technology for smartphones to accept payments with the tap of a credit card. The system will likely use the iPhone’s near field communications, or NFC, chip that is currently used for Apple Pay. In order to accept payments on an iPhone today, merchants need to use payment terminals that plug in or communicate with the phone via Bluetooth. The upcoming feature will instead turn the iPhone into a payment terminal, letting users such as food trucks and hair stylists accept payments with the tap of a credit card or another iPhone onto the back of their device.

https://www.bloomberg.com/news/articles/2022-01-27/apple-to-let-iphones-accept-credit-cards-without-extra-hardware