Filed FB12366071 regarding this

I found my answer - yes they are supported. Two things to check: Make sure you're using Swift Tools 5.9 + I had to delete my existing Resources/ folder containing my *.lproj files.

@kcathey This would be great to have. Just as Apple has documentation for their own LibraryItems, the SwiftUI views in my framework can be quite complex and providing similar doc for users of my views would be great. In fact - I just expected this would be supported out of the box by adding DocC style doc to my library items. Having no way to add details and leaving users with this screen is not a great developer experience: