The thing is, down here in Australia, virtually everyone got the jab, because of various mandates. While it was never strictly mandatory, every office job basically had a policy of "must be double vaxxed by this date, or you will be automatically fired", and almost everywhere required a vaccine passport, which meant your options were to either get the vax or to sit around at home and hope Centrelink comes through with a bank transfer. Naturally, even skeptics and libertarians grunted, grit their teeth, and booked an appointment.
Agree or disagree with the policies all you want, the thing to keep in mind is: When EVERYONE is affected by something, this messes with any sort of follow up data, because you have no real sample to compare it to.
For instance:
Lets say a terrorist poisoned the nations water supply with a mysterious new undetectable chemical immediately after the covid outbreak. As part of his insidious plan, he wants things to look as normal as possible for as long as possible to not raise the alarm and cause maximum damage. As a result, it doesn't kill you quickly - instead, it causes 2 thirds of the population to slowly die from cancer over the next 3-5 years. He doesn't tell anybody about the effects. This is actually not too different from the situation some of the more extreme vaccine skeptics are proposing - instead of a terrorist it's the world economic forum using the vaccines to kill off some arbitrary percentage of the population to create a new world order or something.
The thing is, even if we find the substance, and don't know what it does, how are we supposed to find out? If you were doing population analysis and realized we had a massive increase in cancer rates, how would you know if this cancer was caused by the terrorists weapon, the vaccine, or some other factor? I guess you could say the timing is suspicious - and you'd be right - but you wouldn't be able to get any sort of definitive answer.
What we really needed (and what you get in REAL vaccine research, which was completely skipped for the covid vaccines thanks to operation warp speed, thanks Trump!) is a proper double blind study, only then will we know it's effects.
The takeaway from this is that this whole "post vaccine deaths" thing is largely untestable, and will never be proven or disproven. At absolute best we could say "Thing X increased at time Y after everyone got the vaccines" but it would only ever be a correlation because there would always be the possibility that it was caused by something else.
In this case it's even worse because we AREN'T seeing a massive increase in SADS. We are seeing a small handful of questionable deaths (like Shane Warne) and people are attributing them to the vaccines, meaning not only do we not have a proper control group, but we have a tiny sample size as well. People can't even decide WHICH vaccines are the problem - I've heard everything from "all of them" to "just Pfizer because they are evil" to "Pfizer and Moderna because they are the RNA ones".
Anyone who tries to tell you definitively that the vaccine is causing SADS is pushing a conspiracy theory. At the same time, anyone who tells you that the vaccine is proven 100% safe and that everyone with concerns is a right-wing antivaxxer, is also pushing a conspiracy theory. The truth is, nobody really knows how dangerous this thing is. And even if it did cause some kind of catastrophe, we would never be able to prove it. Admittedly, I am not a Scientist (well, my degree is in Computer Science, but that's not the same), so I could be wrong here, but this whole situation has FUBAR written all over it.
I even hear people suggesting the vaccine causes sterility, as if we are somehow living in the timeline where SG-1 did in fact ally with the Aschen.