Not particularly fond of the UWP paradigm either. For the most part, Linux and Windows versions of apps line up, but the controls may not match, but even MS programs in windows don't align.
More and more, I'm preferring the MS (Whatever the name of the day) and Google (Material Design) approaches for inside the app, with either an integrated or global menu as appropriate for the platform. With the rest in-app experience with a clean UX.
Again, I understand the desire, but most windows programs, in particular MS generational applications, already have disparate user interfaces.