Something overwhelming of WebAuthn/U2F/FIDO2/Passkeys is that it has many different modes and settings [0] So, my understanding is that you need to find the set

Something overwhelming of WebAuthn/U2F/FIDO2/Passkeys is that it has many different modes and settings [0] So, my understanding is that you need to find the settings to 'upgrade' the modes from 2FA to a Passwordless alternative. Not all devices are supported. I like this explanation in Ruby [1] [2] of all the process between the server and the browser. It also has an example you can try on your browser to see if your devices/OS are supported. Look at the bottom the distinction between Passwordless and 2FA. I'm making a proof of concept of WebAuthn the only login option, for a toy project in PHP [0] with this library [1] It has been an interesting exercise to understand the tricky parts of it. [0] https://webauthn.lubu.ch/_test/client.html https://webauthn.lubu.ch/_test/client.html [1] https://betterprogramming.pub/implement-a-passwordless-authentication-app-with-webauthn-aa3635d5d943 https://betterprogramming.pub/implement-a-passwordless-authe... [2] https://archive.ph/SyaEW https://archive.ph/SyaEW [2] https://eapl.mx/twtxt/ https://eapl.mx/twtxt/ [3] https://github.com/lbuchs/WebAuthn https://github.com/lbuchs/WebAuthn