WebAuthN operates on a key pair generated using your biometrics in the background and then that is used for authentication. Your actual biometric data isn't sent to the website.
So I would just sync the keys locally or via some browser-extension and then on each device be responsible to provide the "secret" (e.g. my face or fingerprint) in a readily way to unlock said key, yes?
So I would just sync the keys locally or via some browser-extension and then on each device be responsible to provide the "secret" (e.g. my face or fingerprint) in a readily way to unlock said key, yes?