VM the program? I know that seting up a Apple VM is nothing easy but that will allow you to just use you preferred OS and run that program in the VM. I use winboat on my Pop_OS! laptop for some software that really needs Windows and does not work well (at all) in wine. I dislike the we know better that you mentality that comes with buying a Mac. Hell the amount of times the update fubar’ed my system because Apple decided to update software that has nothing to do with the OS is too damn high.

GIMP is utter shit to work with though :P

No. Bazzite is pretty good at one thing and that thing is gaming. If you want do anything else and there is no flatpack/appimage for it you’re shit out of luck, unless you want to ostree and thereby breaking the reason for using an immutable distro in the first place. That is the whole reason I tried and switched my main rig over to Fedora 43 KDE so I could at least use a normal package manager.