Placing a microwave on top of an oven can be a safety concern and is generally not recommended. Microwaves generate heat during operation, and if they are placed directly on top of an oven, the heat from the oven can affect the performance of the microwave and potentially cause overheating or damage.
Additionally, ovens can produce heat from the top surface during operation, and if a microwave is placed above, it may be exposed to excessive heat, which can be hazardous and increase the risk of fire.
To ensure safety and proper functioning of both appliances, it is generally advised to keep them separate and maintain a sufficient amount of space between them. If you have limited counter space, you might consider alternative options such as mounting the microwave on a wall or using a microwave stand or cart to create a dedicated space for it.