"The 5G radiation is so much weaker: a 5G cell transmits at 46 dBm the most, which is 40 Watts. And you hardly get closer than 100m to the antenna, which brings down the energy your body feels by a factor of 10.000 to the milliwatt range.
Your microwave oven generates microwave radiation of 600 W at least; most of that stays inside, but be sure that there is some leakage. And you get very close to the device. So Microwave Oven is “worse” for your body in terms of absorbed radiation than 5G.
Nonwithstanding that the worst thing Microwave can do to living cells is to burn them — like a stove element or a cup of hot water poured over you. Despite public rumors, there is no risk of cancer with Microwave. That risk comes with much much harder electromagnetic radiation, like sun light, ultraviolet, x-ray and gamma-ray. All the same sort of thing, but the mentioned ones have photons of million to billion times the energy, and can actually interfere with the chemistry of body cells. Microwave photons cannot."
Kurt Behnke, PHD Mathematics & Physics, University of Hamburg