Passkeys are part of XenForo 2.3 natively now, so...
!!! VERY IMPORTANT !!!
If you upgrade to this version, Passkeys that were setup with previous versions of this addon will be deleted. Read that again if you didn't read it fully.
Existing Passkeys from this addon CANNOT be migrated to XenForo 2.3 native Passkeys (XF 2.3 uses resident keys, which allows things like passwordless login, so there's no upgrade path) and existing Passkeys created by previous versions of this addon will be deleted.
Again... existing Passkeys that users setup for themselves will be deleted. Read all this again.