A passkey lets you sign in with your fingerprint, your face or your device PIN instead of a password. It cannot be phished or reused on another site, and it never leaves your device.
Add one from Security on my.quavern.com.
Adding a passkey
Open Security, choose "Add a passkey", and confirm with whatever your device uses. The passkey is listed with the date it was added and the date it was last used. Add one per device you sign in from.
If the page says passkeys are not supported, the browser is too old or the feature is switched off in it. Your password and your two-factor codes still work.
Removing one
Remove it from the same list. That passkey can no longer be used to sign in, and the others are untouched.
Adding a passkey demotes the telephone
If SMS was the sign-in step on the account, adding a passkey turns the telephone number into a contact rather than a key, in the same operation, and the interface says so.
The rule behind it: a telephone is a fallback factor. It is a sign-in factor only while the account has neither an authenticator app nor a passkey. A code by SMS can never disable, replace or bypass either of them. Since anyone who controls a mobile number is not necessarily you, the weaker factor stands down as soon as a stronger one exists.
The number stays on the account, verified, so Quavern can still reach you on it. To make SMS the sign-in step again, remove the passkey and the authenticator app.
A passkey is not a second factor
It is a way of signing in, not a second step added to a password. If you also want an authenticator code at sign-in, turn two-factor authentication on separately.
Quavern help reference: passkeys/en