I have submmited a request for this site to publish Facebook Instant Articles since last Thursday and it finally got approved today (despite it says 24-48 hours review process)
I am using the official plugin called Instant Articles for WP by Automattic to generate an Instant Article RSS feed.
![Facebook Instant Articles - Settings - 1 Facebook Instant Articles - Settings - 1](https://farm2.staticflickr.com/1661/26441598312_1c4652494c_c.jpg)