I haven't implemented this identity provider myself, but from the documentation:

https://fusionauth.io/docs/v1/tech/identity-providers/facebook https://developers.facebook.com/docs/facebook-login/permissions/overview

It appears that 'permissions' are what facebook uses to mean 'scopes'. You ask for a permission of email or user_likes, for example.

Have you tried to put in the scope you want into the permissions field and tested it out?

For anyone reading this in the future, here's a list of the permissions that you can use: https://developers.facebook.com/docs/permissions/reference/

Note that it says:

Every permission below requires App Review, except: email, pages_show_list.