Only nine? We've also got the USA, UK, France, China, and North Korea (who are also at war in Ukraine), but a whole bunch of other countries are probably scrambling for nuclear weapons and won't find it hard to make them: South Korea, Japan, Poland, maybe Germany and Italy, possibly Finland, Australia, and who knows who else.
Remember, nuclear weapons are a 1940s technology. SLBMs are 1960s tech. Cruise missiles are 1980s. It's astonishing they're not more widespread.
https://appdot.net/@jgordon/114483601721350338