Rather than macOS, as a long time Mac user I actually find GNOME most similar to iPadOS. It's almost exactly what one would get if they were asked to turn iPadOS into a desktop OS.
- Default windowing support amounts to split-screen
- App "icon" style launcher, even using the same sliding-widget model people loathe on iPad
- Quick-settings menu pane in the top corner, almost identical to the iOS/iPad one in GNOME 40
I could go on, but I think it's safe to say that GNOME (especially GNOME 40) is derivative of iPad UI design. Other visual cues (dock, lockscreen, stylesheet, calendar, etc.) are pretty plainly inspired by the Mac UI.