How to send instant articles to facebook via api?

Question

PHP

Wrote a script for sending articles via api to the site.
Everything goes away no problem.
All articles go without errors.
But, there are not many articles in the Facebook interface. 2-3 articles are given, but the rest are not.
API does not give any answers other than "successfully", there is no documentation for this case. Who faced such a problem, tell me what could be the problem?

Answer 1

Most likely, too many of them are published and the robot does not have time to check them.
Or articles of poor quality. Could you give examples of what is and what is not?