Maybe more along the lines of the boot camp control panel in windows hasnít been updated to recognize APFS?
Just curious, what advantage do you find boot camp has as compared to just using parallels. Iíve got six different windows virtual machines I use in parallels. I still have an XP, 2 windows 10, and three windows 7. I couldnít see managing all of those with separate partitions, that would be too much of a pain. Also most of the time I need to access both the macOS and windows at the same time.