The very fact that you've qualified your question with "sideloaded" suggests that you are already aware that a non-sideloaded MacOS app is installed into a sandbox that is much more secure than anything available on a standard Linux desktop excepting possibly Qubes and Secureblue, and hardly anyone uses Qubes or Secureblue -- probably for very good reasons.
Yes, and I'm also aware that most macOS apps are still only available as a sideload, where sandboxing is optional and importantly not user visible before the app runs.
