One bias that is always true of forums like this one is that we like both nice cameras and good photography. Most people who don't post here buy (relatively) cheap cameras with (very) cheap lenses to take pictures of their kids (and then don't use them because they're using their iPhone instead). The EOS-M models that are selling well are not the expensive ones - it's the kits found in Best Buy type stores (not sure what the Japanese equivalent is) that pair a $400 body with a $100 lens that drive unit sales.
In the US, those are DSLRs (D3500, latest low-end Rebel). In much of Asia, they're mirrorless, and EOS-M is doing well in that market.
The total interchangeable lens camera market from the cheapest D3500 to the Phase One IQ4150 is ~10 million units/year
Total annual production of Z6+Z7 is under a quarter-million units (20,000/month) - this is straight from Nikon
I've seen 10,000/month for the D850, and the 5D line is probably a little more, but not much
I'd be shocked if the D5 plus 1Dx II added up to 10,000 units/month
The Sony mirrorless full-frame models probably add 50,000/month all told (I don't have data here, but that seems to be the range - hope Thom Hogan posts something comprehensive to his site soon, as he sometimes does).
Medium format is tiny, and not worth worrying about (I'd be amazed if any single non-Fuji maker sold 1000/month, or if everybody together (including Fuji) sold 5000/month)
Somewhere around 1 million of those 10 million cameras are the models we most often talk about here.
Another million are probably the low end of full-frame (D610, D750, EOS 6D mkII) plus the highest end of APS-C (Fuji, D500, EOS 7D). Fuji sells somewhere around half a million interchangeable lens cameras per year or a little more, but many of those are X-A and X-M models, NOT X-Pro, X-T and X-H. you can't find the cheap Fujis in US stores, but (like the EOS-M) they sell well in some Asian markets.
The remaining 8 million cameras/year are never talked about on Luminous - they're sold in department stores with the only lenses they'll ever wear (sometimes you get an 18-55 and a 55-200 with them). That's the volume driver. Volume figures have nothing to do with any camera most of us use (unless you teach, in which case, knowing the controls of all of them is important because that's what students bring - cheap DSLRs are GREAT teaching/learning tools because they combine decent control with instant feedback). For exactly that reason, I make sure to learn to use all of them as they come out...
Dan