Whoever invented the 5G conspiracy theories is either having a laugh or is fundamentally disconnected from how radiation works. This pseudo-scientific nonsense has no place on HN.
One of the key design features of 5G is to drop transmit power (instead having more sites, with lower range per site).
Because signal strength drops off with the square of distance to the tower (technically the cube, but because they transmit a flat beam the relevant part of the graph is square), this results in dramatically less transmit radiation vs 4G.
However, all of this is moot, because the radio frequency used isn't a frequency that could ionize anything even if the transmit power weren't negligible.