https://wccftech.com/apple-might-introduce-qr-code-payments-with-apple-pay-in-ios-14/

With the release of iOS 14 developer beta 2, it has been discovered that Apple is planning on allowing QR code payments in the future with Apple Pay. This will be the first time that Apple Pay would work with this point-of-sales payment mechanism. Currently, Apple Pay works with NFC, as well as online in macOS via Safari browser.

9to5Mac discovered this hidden feature in the Wallet app in iOS 14 developer beta 2. The feature, when official, will allow users to scan a QR code or barcode using the camera, and perform a transaction using any of the Apple Pay compatible cards in their Wallet. Users will also be able to generate a QR code from the wallet app on their iPhone and present it in front of a scanner to make a payment. This might also work with third-party apps, or allow users with other smartphones to scan the QR code to initiate payments.