macOS installs a recovery partition and hides it from you so you can always restore it.
I think the firmware boots you into a macOS mode so you can always recover your macOS system, but when you finished installation Linux may have nuked it.
I’m not an expert though, I’ve just been using Mac’s for 15+ years and have had to reformat several over the years.
I’ve never installed Linux as the primary OS before.
macOS installs a recovery partition and hides it from you so you can always restore it.
I think the firmware boots you into a macOS mode so you can always recover your macOS system, but when you finished installation Linux may have nuked it.
I’m not an expert though, I’ve just been using Mac’s for 15+ years and have had to reformat several over the years.
I’ve never installed Linux as the primary OS before.