Passkeys require another transport added "hybrid".

[tmikaeld]

According to the docs, it seems that the relay only need to allow the transport, then it would work like any FIDO2 key:

"hybrid" missing here:

fido2-lib/lib/validator.js

Line 145 in 9da9eb9

} else if (allowCredential.transports != null && !allowCredential.transports.every(el => ["usb", "nfc", "ble", "cable", "internal"].includes(el))) {

Docs:
https://passkeys.dev/docs/reference/terms/#cross-device-authentication-cda

[JamesCullum]

Feel free to create a pull request - would be great to have a test case for this as well 👍