I am trying to edit my original post since I could not explain what I needed , I want to remove the small microwave to place a microwave convection but the hole area is small . Unless I find a combo small enough, then maybe get ideas of using the other cabinet area besides the microwave area.

Thermidor makes a 1.5 cubic ft convection microwave combo that will fit your space except for depth. You will have to pull your cabinet forward and have carpenter remove the back panel of the cabinet and extend shelf, I.e. Increase the available depth into the void created by pulling the cab forward. Your cabinet will no longer fit flush with your adjacent cabinet but will be pulled forward. Shouldn't matter on fridge side but you might not like the look on the other side. Or, don't move the cabinet and just make the shelf deeper, then your microwave will stick out forward several inches away from the cabinet frame. Won't look built in. You appear to have such a high end kitchen, you may not want to "make do." Bite the bullet and replace the entire corner cabs with ones that will accommodate a new micro conv combo.

Thank you , I was hoping for a less deep appliance; then use the 2nd cabinet to get more width space.