Does anyone know if this is different to Webauthn? You can already login with touchid/faceid, with the private key stored in apples keychain. Lots of sites support it, I just added it as 2FA to Mailpace (https://blog.mailpace.com/blog/why-we-use-webauthn-for-2fa/), making it passwordless login instead of 2FA is trivial and fully supported by webauthn.
What’s different about this?