> I don't use any syncing system, I'm not on iCloud, or use apps, or anything like that, so there's no mechanic for distribution of passkeys. Plus that wouldn't

> I don't use any syncing system, I'm not on iCloud, or use apps, or anything like that, so there's no mechanic for distribution of passkeys. Plus that wouldn't work if I wanted to log from my friends laptop, or something like that. iOS and Android can also just keep local Passkeys where you scan a QR code, though of course if you don't backup anything anywhere you will always have a redundancy problem with any 2FA mechanism. Passkeys are supposed to not be a single authenticator either, so you can enroll another Phone or a Yubikey (or also your local TPM, binding to your user account, for convenience), but not all services support that in practice.