There have been studies that showed some results when testing microwave (transmission) radiation on animal models but they have not showed anything close to a smoking gun. These results may be statistically significant (Which is not the 5 sigma used in HEP, but still), but no study I have seen attempts to contextualize any potential risk i.e. There is a reason why 5G is in the same WHO cancer risk band as working as a carpenter

Imagine the same but with the radium: The Animals would have obviously got cancer or Aplastic Anemia (Or more acute symptoms of radiation sickness). If there was clear evidence that 5G caused illness in humans, it wouldn't be happening