CGC has said (more than once) that they plan to re-run MMr in "early" 2023. Of course, that was before they got so far behind on deliveries of CCr.
I am hoping that they still plan to do the re-run once the CCr machines are done. If so, it will probably be "late" 2023 or maybe "early" 2024.
They have never said anything about building more MBr or AFMr. Considering that those machines were available long after the launch (except for the LE versions), I doubt that they are in any hurry on those.
Supposedly, they are also working on some "original" machines. I would assume that those would take priority over more MBr and AFMr.
I just hope they do actually make more MMr...I've been on a waiting list for over a year already.