I’m here to say that I was able to resolve my problem. Here is how:
I followed up the old API’s Instruction and generated a set of client key and secret. Then created a video demo of the app and submitted a review request on the old Instagram platform clearing out that I’m going to use this API only for the login process and just defining the basic scope to be reviewed. (Again all this happened on the old Instagram platform and not the new Facebook graph platform).
After around 24 hours, they have approved my request:
I also figured out that the problem on base scope on Facebook’s graph API (I stated above), will be resolved soon (early 2019) at least as far as they have promised in this document, which gives about a year time window before the old basic scope’s deprecation. Using the old API works perfectly inside the Auth0, but none of the scopes (other than the default selected basic) will be applied.
Hope it helps you.