Password-Manager auf Mobile entsperren funktioniert nicht obwohl die Einstellung im Browser gemacht wurde
Have you ever had this working or is this the first time setting this up?
Check all the steps again for setup in this Norton Support Article.
If you have changed phones, you need to remove the old phone from the Passwordless Unlock settings and then register the new phone. Even if it is the same phone number. It is not the phone number but the installation serial number that is used to identify which phone to use.