"A passkey doesn't leave your mobile device when signing in like this. Only a securely generated code is exchanged with the site so, unlike a password, there's nothing that could be leaked."
How to circumvent this in order to store the "passkey" in a regular password manager on the same desktop machine, not an external mobile device, so you can do proper backups of it and need no secondary device?
NOTICE: I am aware of the security implications. I don't care about them. I don't want any locked-down hardware to prevent me from accessing my own keys. I want control of my own keys.
Linux users be damned: "Chrome on Linux doesn't support passkeys with a built-in platform authenticator. Linux users can use passkeys from another device such as an Android phone or an iPhone by scanning a QR code."
No plans to support it either [1] https://developers.google.com/identity/passkeys/supported-en...