@cavyherd Not remembering which rev of MacOS applies, but before Monterey, the primary disk could be partitioned into multiple, discrete bootable partitions, and I ran Ubuntu on those easily. At the time, the rev of Ubuntu was developed so well, it absolutely knew how to run the touch bar of the nacbook pro.
More recented revs of the OS do this containerized segmentation, instead of true disk partitioning. I have not tried installing linux under this mac master boot scenario.
I also am also "a user" not a sys-admin type, so I never really delved into trying much on the new mac phoney-mac os revs. i just know I hate the newer os structures. They took EMACS out!