I honestly don't understand the whole "nukes are fake" conspiracy theory. It sounds even dumber than flat earth.
Seriously, how can they cover up Hiroshima and Nagasaki if those explosions were fake. People who were near the alleged blast zones would've called bullshit on it.
Now I am open to the idea that the technology hasn't improved much (if at all) since those two bombs, and the threat of nuclear war is just a psyop to get everyone to accept the idea of a one world government as the only solution to save humanity from itself. Shit like the Doomsday Clock looks like fearmongering for that exact purpose, but to suggest that nuclear bombs have never existed is a bit of a stretch.