The kitchen was relocated to relate to the rear deck and backyard. Since the house is located on a tight urban site, windows were added above the cabinets to balance the light throughout the room. Modern appliances were set in traditional cabinetry.
Could be just a regular microwave. You can buy "Trim Kits" to make them look built in it is done quite regularly when installing one above a wall oven. The better "all appliance stores" should be able to help you out. Click on this link to give you an idea. https://panasonic.ca/english/appliance/microwave/trimkit.asp