No, only three of the parties to the mediation (BSA, Century, Hartford) were served.
Frankly, if they even TRIED to demand production from the mediators it would be (almost) instantly quashed by the court. The whole idea of private mediation is you cannot force the other sides, and ESPECIALLY the mediators, to reveal those proceedings outside some extraordinary showing (e.g. during mediation, one party indicated they were actively engaged in current criminal conduct).
But if you were not part of that mediation, you can ask on what basis the conclusion was reached. So, here, the claim