No, an infrared camera cannot see through a microwave. Infrared cameras detect and visualize thermal radiation emitted by objects, which is typically in the infrared wavelength range. Microwaves, on the other hand, use electromagnetic waves in the microwave frequency range to heat food and other materials.
Microwave ovens are designed with a metal mesh on the door, which acts as a Faraday cage. A Faraday cage is a conductive enclosure that blocks electromagnetic fields, including microwaves. This design prevents microwaves from escaping the oven and potentially interfering with other electronic devices or causing harm to people nearby.
Since infrared cameras rely on detecting thermal radiation and cannot detect microwave radiation, they cannot "see through" a microwave oven or the metal mesh in its door. When using an infrared camera to observe the exterior of a microwave oven while it is operating, you will typically only see the heat generated from the microwave's heating process on the outer surface of the oven.