On top of my head of apps I use more or less daily. Xcode, Hazel, DragonDrop, 1Password, DayOne, Alfred, KeyboardMaestro, LINE, DaisyDisk, Sketch, Hopper, Fantastical 2, SnappyApp, BetterTouchTool and so on.

Some may have equivalents (but I'm sure nothing as polished) or will run under Wine but I have bad experiences with both.

There are also workflows that take advantage of macOS features (e.g. location service) that wouldn't work on Linux I guess.

Adobe, Avid, Scrivener, Scapple, MS Office (yes), Movie Magic Scheduling, MM Budgeting to name just a few among many.

Not Mac OS specific, but Photoshop or the Unity engine are good examples.