//Slight Hijack but some I think meaningful context//
"Nuclear Power" a somewhat sloppier term then we sometimes think.
If you have a domestic nuclear power program (or sufficiently large and advanced nuclear medicine program or any form of uranium or plutonium processing) and basically any military delivery system more advanced than horseback cavalry and a slingshot... okay you're not "technically" a nuclear power but you're not a nuclear power in the same way a guy holding an unloaded gun in one hand an a full magazine in the other hand doesn't have a loaded weapon. Yes the gun is not loaded, but the gun is not loaded in a VERY different way from a guy holding an empty gun and he would have to go to the store and buy bullets. There's not loaded and then there's "not loaded."
Japan is often described as a "one twist of the screwdiver" away from being a major nuclear power, same thing with Canada, Germany, the Netherlands, Australia, and yes, Iran.
Now this is not a label of intent or desire, but from a purely technical standpoint those countries could all be reasonably large nuclear powers in a very short period of time without major research, fabrication, or "work" needed.
And real talk, even the very non-nuclear desiring of those it would shock me exactly zero percent if they do, somewhere deep in their classified defense strategies, have a plan for just that if absolutely necessary.