Linux doesn't have a first class authenticator API yeah. If you want to, you can buy a security key and get passkeys that don't sync. I wouldn't recommend that to most people since you have to do your own backup management but if you're a linux user maybe they're less of a footgun.
There's nothing stopping vendors from implementing their own passkey syncing solutions for linux (dashlane and 1password have implementations, maybe more out there?)
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Linux doesn't have a first class authenticator API yeah. If you want to, you can buy a security key and get passkeys that don't sync. I wouldn't recommend that to most people since you have to do your own backup management but if you're a linux user maybe they're less of a footgun.
There's nothing stopping vendors from implementing their own passkey syncing solutions for linux (dashlane and 1password have implementations, maybe more out there?)