[neonnomad]

1password can store passkeys for you and sync between multiple devices. Then I add a Yubikey Bio to add of these accounts as a backup.

[lostindetails]

Thank you for the answer! I don't want to use a cloud service for sync, I will take a look if an opensource solution has a direct device to device sync, I haven't thought about that. I will also checkout the yubikey bio - I guess as it's hardware so no pesky account cloud connected? Thanks for the ideas!