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Yes. There have been microwaves with heat elements in them for ages. You remove the glass plate, put in a wire rack, and run it in convection mode. They generally already have modest fans to help combat hot spots. I'm not sure about the brand-new ones, but the last one I had either ran in convection mode or microwave mode.

Air fryers usually have a massive coil tucked away in the top and blast heat+IR down on the food, but you can't just throw a large metal coil in the middle of a microwave, You could cover it over with a mica waveguide, but those don't love to pass through heat.