Both Sony and Canon MILC market share grew by ~5% from 2020 to 2021. Unless you have data suggesting the supply chain issues differentially affected one or the other, why assume so? The only 'skew' is that there may be unmet demand for some camera bodies (I preordered my R3 in the first few minutes, those who waited a few hours to preorder waited a few extra months for their R3). If you want to assume that while both Canon and Sony grew at the same rate, only Sony or only Canon would have grown faster because there was more demand they couldn't meet, that's less of an assumption and more of an ASSumption.
How so? I'm not interpreting (or misinterpreting) demand. Demand is hard to quantify, and honestly it doesn't matter all that much. Lots of people want to buy a BMW or Mercedes, so demand is high. But most people actually buy a Toyota or a Honda. If you want to talk demand, it's interesting that you mention all of Sony's presumably forthcoming bodies but ignore the R7 and R10. I suspect that those less expensive bodies will have a significant impact on MILC market share, even with only partial year impact for 2022. Those are the Toyotas and Hondas of the MILC market. Will be interesting to see who leads the MILC market in 2024.
You can believe whatever you want. There's no objective way to measure what is 'the best' in those terms. Sony doesn't have an f/2 standard zoom, and I love my 28-70/2. Sony doesn't have a 70-200/2.8 that fits vertically in my camera bag slot, the Sony lens would take up two lens spaces instead of one. Sony doesn't even make TS-E / PC lenses or a fisheye zoom (I have no use for the latter, but have two of the former, along with the MP-E 65 for which there's also no Sony equivalent). Everyone's best is unique to them.
What can be measured is what people actually buy. And for that, we go back to my initial statement that >50% of ILCs sold last year were made by Canon. So while everyone determines what's best for them, the fact is that the majority of ILC buyers think that system that's best for them is Canon.