I am facing an issue that Auth0 response is not returning the user_link information after checking the Profile URL checkbox on Authentication > Social > Facebook.
I also tried to debug the Social by creating a new rule and using the Real-time Webtask Logs to troubleshoot. However, I don’t see the response either.
Welcome to the Auth0 Community, and sorry about the late reply!
I found a Facebook doc talking about the user_link permission. It mentions:
If you ask for permissions other than email or public_profile, you must submit your app for app review so Facebook can confirm that the app uses the data in intended ways and safeguards user privacy.