You only ordered a 24” cabinet? You will have extensive and expensive field alterations from an expert cabinet installer, but a Sharp MW drawer will fit it. But only if it is between 2 cabinets. Because you have to cut away most of the face frame support to make it work. So it needs cabinets on both sides to provide that support.

If you ordered a 30”, any countertop MW with a 30” trim kit will fit, after a standard field alteration. But you will have to crouch down to see the controls.