Software-based passkeys can do this! Bulwark Passkey (https://bulwark.id https://bulwark.id) is a virtual Yubikey-like device, and you can back up the credentia

Software-based passkeys can do this! Bulwark Passkey (https://bulwark.id https://bulwark.id) is a virtual Yubikey-like device, and you can back up the credentials file however you like.