Yeah, I'm guessing neither Moscow nor Beijing is going to ever offer such a pact. In effect, that would be asking those countries to bet millions of their own citizens on the Iranian regime. With Ukraine still happening? Not ever gonna happen. They aren't going to break that precedent.
I'm not going to bother with an effort post. It's would be wasted on you. Suffice to say, I think you have an extremely naïve understanding of how the world of International Relations works in general and non-proliferation policy in specific. I don't blame you or want to shit on you for this, so don't take it that way. Most people are in the same boat. I just have a lingering bit of Cold War history autism, still. Take my word or don't, your choice on how many grains of salt...
But you are dead ass wrong if you think this likely to ever happen in this way.