Food does not magically cook in microwaves. Water is heated inside the food, and the hot or warm water subsequently aids in warming the remaining food. When you thaw a sauce packet by slipping it into a mug of hot water, see it as placing food in a water bath.
Different cooking methods might indeed affect nutrients differently. Because the water that warms up is a component of the meal itself, boiling food can cause certain nutrients to leak out into the water, but this is not a problem in this case.
Not Harmful Radiation

Ionizing radiation—the sort that comes from X-rays —comes to mind when we consider radiation a potential health risk. Ionizing radiation is exceptionally harmful since it can potentially make both people and things exposed to it radioactive.
Radiation from microwaves is non-ionizing. The heat from a lamp, ultraviolet light, and most other light sources are other forms of non-ionizing radiation. Radio waves are also non-ionizing radiation.
Examples of Radio Waves

Examples of radio waves include those that are broadcast by one walkie-talkie in a set and are picked up by the other, those that are transmitted by radio towers and are picked up by your vehicle radio. And those transmitted by your wi-fi hotspot are picked up by your phone or computer.
The fact that a microwave's shielding is destroyed might interfere with your wi-fi connection because microwaves operate at a frequency that is extremely similar to wi-fi.
Baby Safe

Why are we occasionally advised not to reheat baby food or formula in a microwave if microwaves are used so often? It's not because the food is harmed by the microwave; instead, it might heat meals unevenly.
The baby might ingest too-hot formula if there are hot patches in the bottle or bowl of food and it hasn't been thoroughly blended before being given to the infant.