@Jimrh1993
Your PopOuts only show the images from the simulator.
They do not bring the buttons and knobs with them.
Air Manger is a software that uses what are called “Overlays”
These are virtual instruments that have all the active buttons coded to operate in the simulator (MSFS or Xplane or…)… just like you can press buttons on your controllers for operating flaps or gear or other things in the sim.
The “overlays” have all the same buttons as the PDF or MDF and they work whether or not the Popout is on your monitors, but they are made with a transparent section the same size as the popout… so it then looks like you have the whole Garmin on the monitor.
You can see one of them on the left in this picture of my cockpit.
You can place an “overlay” on both screens and the “see through” area is where you place the popouts.
But you need Air Manager ( or a program like it - which unfortunately does not yet exist )