[edit: this was an accidental duplicate comment]

The only workaround I’ve found is to replace all NavigationLinks with Buttons that navigate programmatically, e.g. by appending values onto the path that you pass into NavigationView. Longer term, moving away from SwiftUI (or tvOS entirely) is looking pretty good. If they let something as fundamental as NavigationLink be totally broken like this, it's only a matter of time before any workaround also gets broken, because SwiftUI on tvOS appears to be effectively unsupported.