Something like the m5/m50 would work, and could be quite compact as an RF-C, but will never be as compact as the little m200 (which I adore), with the 22mm - On the m200, the body is basically the size of the lens mount. It would need to grow 7mm to fit an RF. And again, the 22mm is about the size of the lens mount. It would also need to grow. You just can't get a RF-C as compact as an M.
Maybe canon is selling a lot more m50s/m6s than they are selling m100/200's, and that's driving the decision.
If this happens, I'll just go back to my fuji for my compact setup when I finally need to upgrade/replace - I didn't sell the lenses i had.
( to be fair, I sold my m5 when I got my RP. Practically as compact since the m5 was just a bit too big to be pocketable, with much better quality/features/lenses)