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Re:Apple, Google and Microsoft Commit to Expanded Support fo... by password4321 on Thursday May 05, 2022 @12:30PM (#31275434)
There are some software tokens (Wear OS watch, Android phone), but they are purposely not exportable from the Android Keystore.

https://github.com/herrjemand/awesome-webauthn#software-auth...

There was mention of a secure backup proposal, but it doesn't appear to have been touched after being a draft for a year:

https://github.com/Yubico/webauthn-recovery-extension

Re:Apple, Google and Microsoft Commit to Expanded Support fo... by lrvick on Thursday May 05, 2022 @05:58PM (#31278824)
Devices like Ledger already have seed phrase backup/restore via BIP39, but this is only safe or practical on devices with a screen which Yubico is very adamantly against ever supporting.