What if the QR code is in an email?
How do I scan or link up to a QR code sent in an email?
iPhone XR, iOS 14
You can print it out and then scan it. You can retrieve the email on another device and then scan the screen. You can take a screen shot of the email with the QR code and then text it to someone and then have that person open it and scan it with your iPhone.
Axel F.