New ask Hacker News story: What do you think of Scan QR to Login as a Service?

What do you think of Scan QR to Login as a Service?
2 by PranavBerry | 2 comments on Hacker News.
I'm Ideating on offering Scan QR Code to Login as a Service. How it works? 1. Add your account to my authenticator app. 2. Whenever you need to sign-in, scan the QR code displayed on the website from my authenticator app. 3. Enter your device pin or use TouchId/FaceId and you will be logged in on the website. My service will manage the generation of the QR codes, the authenticator app, etc. I also think 2FA will not be needed when using this as my authenticator app will check two factors - 1. If the request is being made from the device which the users posses. 2. The passcode/biometrics of the phone. I think my service will be really useful for no-code/low code websites as well as websites which do not have a native mobile app. Please let me know what you think about this idea. PS - I'm not sure if it's ok to post this on HN, please let me know if it's not ok and I'll take it down.