I used MacOS briefly 2000-2004, and then got a Macbook in 2022. Even among Apple's built-in apps, I can't identify why they would be considered "native".
For example, Apple's Music app is surely "native", but does not appear to use the DEs default elements, and performs like an electron app might.
One would also expect Applescript / Automator (Apple's built-in macro tool, a-la AutoHotkey / xdotool) to work with native apps, but it doesn't work on ARM Macbooks.
Compared to Linux, I think anyone with no experience in it could sort native GTK vs native Qt vs native xMotif applications. But I think "native" as a quality is more of a dependency management and consistency question.
The only thing I can recognize from Panic's screenshots that appear "native" is the Preferences page, in the older "grid on a shelf" format. (edit) And the "install applications by dragging to the Applications" folder workflow, which I appreciate very much.
All this is to ask, what does "works and feels native" mean and what makes it desirable?