This is already a thing, admin side uses qr code reader you can find at components.adalomatic.com for 25$ and whatever the qr data is you can make it change a input then make actions, and use magic text with a qr code generator.

Also thought about it. This will be a convenient feature for applications of fitness centers, for example, generating a subscription with a barcode or QR code. Well, I am sure that it will also be useful for other niches.

It would be fabulous