Europe and Canada approved AstraZeneca's vaccine while the FDA didn't (not debating whether it was a "good" decision, just that it did). Canada also approved of vaccine dose mixing (out of necessity, but nonetheless it was clearly not following the FDA). Plus, by and large Europe and Canada's leaders did not actively harm Covid treatment and vaccine efforts (many policy missteps, but nobody was actively politicizing the virus itself).

They might be politicized internally, but they don't give a crap about Trump vs Biden, or red vs. blue.

UK, Brazil and India have right wing govts, do you really think they would suppress real cures and destroy their economy and popularity of their leaders and parties due to lockdowns, hospitalizations, and the dead filling up burial grounds. If HCQ or IVR actually worked, a leader would have mandated it and would have become hugely popular for saving their country from a pandemic that other countries are getting roiled by. Imagine how much more popular Boris or Modi would become, it would literally seal their next election win.

Or maybe IVR or HCQ aren't good drugs against covid and are hyped up for political reasons by some and then pushed by others who aren't capable of properly reading or understanding scientific studies.

This conspiracy only makes sense to people who cannot think broadly, skeptically and logically.

Bolsanaro in Brazil definitely tried to do that with HCQ - but it didn’t actually work, so at some point he just stopped and pretended he never did it.