Currently, when you enable the experimental multi-display feature (the sim provides additional render windows instead of using one large one provided by NVsurround or Eyefinity) the setting it exposes is ‘lateral rotation offset’ which lets you arrange the displays around you horizontally.
Presumably, if they also enabled vertical offset, you could add a display oriented to show any part of the cockpit? From there, you could make an invisible overlay for it in AirManager.
The sim doesn’t have separate 3D and 2D virtual cockpits anymore, so it’s just about controlling where the camera is pointed in the extra render window. Setting aside resource requirements.
I suppose the other problem is that the view would move when changing the POV or using headtracking/VR, so Asobo would also need to add an option to lock that display, to properly support a dedicated panel view (if that’s not already in, I haven’t played around with the feature myself).