I have an web app which as a function to share posts on facebook pages. I am using Graph APi page_id/photos endpoint for the same. I want to publish a post on behalf of my customers on their business page. My meta App has all the necessary permissions mentioned in the document Link: https://developers.facebook.com/docs/graph-api/reference/photo#Creating I am using my customer's user access token and page access token to do the same.

I want to understand if this function is possible in the first place, does Meta allow this? If so, do I need any other permission that I am missing?