Below is copy of a support topic I created in the support area for the WP-WebAuthn plugin, but reworded as a support topic for the Two Factor plugin. I found the relevant code while searching for a plugin that supports Passkey a.k.a. WebAuthn a.k.a. FIDO2, but that’s another issue.

I noticed the code of the plugin WP-WebAuthn, in the file wwa-compatibility.php, disables the ‘wp_login’ hook of the plugin Two Factor. If this in fact disables the Two Factor plugin, then it seems WP-WebAuthn should mention that in the FAQ, the readme, and a notice given to the user installing the WP-WebAuthn. I don’t see /two.+factor/i elsewhere in the code of WP-WebAuthn.

The relevant code was added to WP-WebAuthn in version 1.0.8, May 11, 2020, with the note “Improve: Compatibility with Two Factor plugin.”