Hello,
I understand your project and what you want to accomplish, and i can develop an automation that does this in around 2-3 days.
Ihave no experience with facebook api's, but i can do it by developing a software robot in UiPath and doing the task in the foreground. However, i also have experience in building front-ends and calling different API's from my previous job, so if using facebook's own tools is necesarry i can look into it.
Best regards.