No, sunlight does not affect how fast foods are cooked in a microwave oven. The cooking process in a microwave oven is primarily based on the absorption of microwave radiation by the water molecules present in the food. Microwave ovens emit electromagnetic waves in the microwave frequency range, causing the water molecules in the food to vibrate rapidly, generating heat and cooking the food from within.
Sunlight, on the other hand, is in the visible light spectrum and does not emit microwaves. Therefore, it does not contribute to the cooking process in a microwave oven. The cooking time and process in a microwave oven depend on factors such as the food's mass, composition, and density, as well as the power settings of the microwave oven.
It's worth noting that microwave ovens are designed to contain and shield the microwaves within the cooking chamber, preventing them from escaping and posing any danger to users. So, the presence of sunlight in the kitchen or near the microwave does not affect its cooking performance.