Having read briefly through the thread, it seem like there is way too much over-thinking going on. It sounds like you want a pro level camera. A camera that can shoot sports, birds, wildlife, and perhaps anything else. If that is the case, then the R5 mark II seems like the obvious choice. The R7 is not on par with the R5 mark II in terms of it's Autofocus. While good, it is not the best. That may be the most important specification when it comes to birds and wildlife, and while the R7 has greater resolution, the difference is not that much, plus the R7 is scheduled to have a new model coming out in 2025. So the current R7 should be eliminated from the conversation. The R1 is certainly a possibility, but the 45 MP R5 II seems the better choice for birds and wildlife, and even perhaps sports if you need the extra cropping ability. The same applies to the R3, which is also an excellent sports camera - and despite your opinion about is becoming out-dated - will be an excellent sports camera for the next decade. Others have mentioned that camera tech has matured and there is often little difference between generations. This is something you should not ignore and makes all of your statements about current models like the R6 mark II or the R3 essentially invalid. Those cameras will be fine for many years to come.
What you should obviously do, is not prolong useless discussions on the internet, but, if possible, rent a R5 mark II - or perhaps one other choice (R1 or R3) and try them for yourself. That will be the only answer that counts. Not what we, or anyone else, says.
And frankly, if budget is an issue, if you choose the Canon R5 mark II, your Sony camera and lenses could easily be sold as they are quite redundant. I think many would agree that the Canon is superior in ergonomics, ruggedness, weather sealing, color science and both back screen and viewfinder.