Our bodies do resolve down to energy fields so it would stand to reason there would be environmental interactions (other fields) that would lead to an interference pattern (and there would be varying effects; with some frequencies having mild constructive interference or 'not bad' effects, and likely some specific values/tight ranges that cause destructive interference and effectively destroy tissue.

Here's one study's abstract confirming that, albiet on lower frequencies than 5g. https://pubmed.ncbi.nlm.nih.gov/751078/ [not sure where the actual study materials/data are, but I'd imagine there are more like this to be found.]

I'm not sure we'd see any sort of public scientific test of a 'death frequency'...kinda hard to do a study where you're deliberately trying to invoke/prove a death response. I'd imagine any proof would have to be classified/hidden (discovered and kept under gov't or military programs). There are certainly a lot of 'sources' pointing to this being a causal relationship (5g + sudden death), but do seemingly require reading between the lines or connecting the dots, rather than having undoubted proof.