You can export Nave for iOS patches to your Nave VST/AU.
The iPad Pro is supported, but not the special iPad Pro force touch. And I think the screen is not optimized for it, because the iPad Pro was introduced well after the Nave for iOS.
The iOS is NOT meant to be a "light" version, it is the original Nave. Due to user request a VST/AU version was introduced later. I prefer the iOS version as using my fingers for editing is more natural then using my computer mouse to point to knobs. But actually I would prefer a real hardware Nave synth.