I’m not sure what you mean by how many users used which display as for content on the displays then that’s already reported in the proof of play statistics (which can be called via API as well as web ui).
Or do you need some other specific data that is not included there?
You certainly could create a new menu item with twig views and controller that would have the function you want then connect that to middleware for webui/api access route - that is explained in extending manual page