OptionalenabledTrue if, and only if, the one or two PRFs are available for use with the created credential. This is only reported during registration and is not present in the case of authentication.
OptionalresultsThe results of evaluating the PRF for the inputs given in eval or evalByCredential. Outputs may not be available during registration;
PRF extension outputs
See
https://w3c.github.io/webauthn/#dictdef-authenticationextensionsprfoutputs