Welcome! This forum has a treasure trove of great info – Scouters helping Scouters! Just a heads up, though - all content, information, and opinions shared on this forum are those of the author, not the BSA.
I have not seen a nationally maintained list of reservations and camps in years.
I suspect there are identification, data maintenance costs, labor costs, and possibility tax related issues. I suggest talking to your council senior staff if you wish to have your council sponsor this request.