Ever since the U.S. lost its nuclear monopoly, MAD has prevented any nation from using nukes in war. It’s nearly 80 years since Hiroshima and Nagasaki. A pretty long record of non-use for a weapon.
Fission bombs, The Atomic Bomb, are outdated.
Fusion Bombs, The Hydrogen Bomb, are the biggie.
Try this:
https://nuclearsecrecy.com/nukemap/