Practically every nation on Earth except Iran. Even the countries that have friendly relations with Iran would prefer to negotiate from a position of power. Notice that even after all these years that neither Russia, China, or any of the other nuclear powers have “lost” nuclear material or technical information to enable Iran to make a nuclear weapon. And none of the non-nuclear powers would be happy if Iran had nukes but they did not.

The “almost” qualifier was intended for you. Other than that, more nukes on earth aren’t good for anyone, especially as Iranian nukes would enable - not restrain - their aggression.