Based on your comments, I would like to ask for your feedback on an updated version of my original design. See the attached diagram. The gypsum in the center has been moved to the outside layer, and Instead of leaving a 1" inch air gap in the middle, it has an 1/8" Hardboard Tempered Panel (something cheap) there. Something to help constrain bats of insulation. And to divide the two sections of the wall.
Is this likely to be approved for a 2hr fire resistance rating?