The NavigationSplitView works with List selection, and the NavigationLink must include the label and a value. The new process is explained here https://developer.apple.com/videos/play/wwdc2022/10054/ Although it works, there is an issue with the view at the moment. If you use an if else or a switch to select the view to show in Detail, it doesn't work. The solution for now is to embed it in a ZStack, as explained in this post https://developer.apple.com/forums/thread/707924

I solved all the issues by replacing the NSSortDescriptor class by the SortDescriptor structure.

Do you know a better way to create the persistent store for the previews? I tried other approaches but the previews always crashes.

I have the same problem in Xcode 13.2. The only solution was to uninstall the 13.2 version and install the 13.1 version again. Very annoying.