In other words the countries with the biggest arsenal of all kinds of Weapons of Mass Destruction (one of which is nuclear) have sanctioned a country that might want to build nuclear weapons but so far there has not been a single evidence of it.
Hypocrisy?

FYI the beef they have with Iran has nothing to do with nukes, it is all about fossil fuels (oil+gas) that Iran has the most of in the world. In the media they can't tell you that "Iran has the most sophisticated defenses that we want to force them to give up under JCPOA disguise so we can eventually invade and steal all those fuels" because you won't find it appealing. But if they tell you that "Iran is building nukes" then you feel threatened. So they do that instead.
BTW they did exactly the same with Iraq. They first told you Iraq has WMDs but under the hood they were forcing them to give up their defensive capabilities. It took about 10 years of sanctions and disarming and attacks to weaken Iraq enough to start the invasion with the help of dozens of countries!!!