I've spent quite some time searching the Internet for a book specifically about SwiftUI for macOS. There just seems not to exist any such book, except some older ones covering Swift 2.0. There is an enormous amount of books and online courses about SwiftUI for iOS, but almost nothing about SwiftUI for macOS.
Makes me wonder whether everything once learned for SwiftUI for iOS can also be applied the same way for macOS. But the iPad has a much simple GUI than macOS. So I don't think that this is the case.
I would be thankful for any links to some books about SwiftUI development for macOS or some online course.