Any decent password manager can handle all of those. Apple does. I’d expect the same of Chrome, Edge, Firefox and 1Password but don’t personally use any of them.

Why not just set yourself up to be able to access her password vault? Why is copying magic strings a better solution? You could have done that to get password access without passkeys existing. So they change nothing.

If you are going to store passkeys in a password manager, the whole situation is no more secure than just using passwords.

Consider:

1. Password managers tie passwords to sites, so phishing-resistance is achieved. 2. Password managers allow long, complicated, individual password per web site, so compromise blast radius is 1.