Facebook Instant Article Issue

Good Evening Everyone!
i'm trying to link my facebook page with the instant article plugin on wordpress platform. However, when trying to sign up to it, facebook does not showing up my page for selection.
please see the attached, I've put a box around the message i'm getting everytime.
Thank you,

Maybe the page is newly created. I think a page should be 90 days before it can appear on the list. Correct me if i'm wrong.