Can't you switch profiles on your phone without scanning an NFC tag already? Couldn't your app allow profile switching without requiring any NFC tags?
It's not clear to me what the NFC tags add to this experience.
https://support.apple.com/guide/iphone/set-up-a-focus-iphd62...
Having my phone ring at home and vibrate when away is the most obvious use case for this feature, and yet it can't be implemented because you can't toggle a physical switch in hardware.
I know the latest generation iPhones don't have those, and I think that's the right decision, but it's still disappointing for older-gen users.