I'm seeing the same issue too. I suspect I'll have to ditch NavigationPath for now - even in iOS 16 it seems unusable with NavigationSplitView. (FWIW I've tried a separate NavigationPath for each of list item, but still behaves oddly.)

I'm still hitting this problem on MacOS / Xcode 14.3. More specifically, bottom bar items appear (.primaryAction, .secondaryAction, .automatic), but items such as .navigation and .principal don't. And yes, this is all within a NavigationStack.