If I remember correctly, there are only 3 NATO countries that have produced nuclear weapons: Great Britain, Franc and the USA. No other NATO country has nukes of their own production. During the Cold War, there were US nukes in several of the countries, but those were under the strict control of the US Army/Air Force. I might be wrong, but all of the Army nukes for 8 inch and 155mm artillery were withdrawn after about 1990 and have been destroyed. I’m guessing the same has happened to other US Army nukes for missile systems that have been discarded, such as the old Honest John. (marking my age with this one)
Non NATO countries who have produced nuclear weapons may include: Israel, S.Korea, Taiwan, S.Africa cira 1977/78; Iran 2024, Japan/Germany/Italy, and those who are known are Pakistan, China, India, Russia....
The way to know if a country has nukes for sure if they cannot stand up to those aligned against them, and the wars have turned into words.