Each of those vaccines come from a UN/WHO member country.
Geo politically power is wielded by globalist financial elites. These elites generally believe the world is overpopulated. Bill himself is well known for his this belief. Bill as an example runs a charitable foundation that only ever seems to make money.
These conspiracies are not constituted of a flat earth and aliens. They are of human hierarchies, corruption, and psychopaths.
If your idea is based on the existence of psychopathic financiers controlling organizations that every country on the planet is part of, and every vaccine production as well in those countries which use completely different technology, then you have left no oxygen in your mind for disproving anything. You've now exempted China from any scrutiny, in exchange for psychopathic financiers that would have much difficulty in collaborating with the party and maintaining status with them. You've replaced that with an insidious plot that makes zero sense and at the best requires opportunists to simply seize onto the reality. But that makes zero sense because the mRNA vaccines were sequenced within a week of getting samples in January 2020 because the technology is simply impressive and is the lifetime work of the Hungarian researcher. Ah, so many problems with this idea.
So you'd be fine with a Taiwanese vaccine then? That's the only country I know of that has significant medical R&D and is one of the few countries not in the UN or WHO.
Now you want to talk conspiracies to conceal or coverup how the virus came to be, I'm all for that but I don't think billionaires want to kill off all their neighbors just so they can have the earth all to themselves. They enjoy the power and control over people and policy too much for that.
It's because social-security/pension systems are a pyramid schemes that can't sustain themselves without ever growing population. I consider many Western EU countries overpopulated (UK, Italy, etc), Google Maps satellite images also do a pretty good job at portraying at just how overpopulated the earth is. Pop growth every decade is still insane.