Removing type: parameter in package products helped me fix SwiftUI previews: .library( name: "MyLib", // type: .static, targets: ["MyLib"] )

You can try this: let appearance = UINavigationBarAppearance()   appearance.configureWithOpaqueBackground() // configure       let backItemAppearance = UIBarButtonItemAppearance()   backItemAppearance.normal.titleTextAttributes = [.foregroundColor : UIColor.white] // fix text color   appearance.backButtonAppearance = backItemAppearance       let image = UIImage(systemName: "chevron.backward")?.withTintColor(.white, renderingMode: .alwaysOriginal) // fix indicator color   appearance.setBackIndicatorImage(image, transitionMaskImage: image)       UINavigationBar.appearance().tintColor = .white // probably not needed       UINavigationBar.appearance().standardAppearance = appearance   UINavigationBar.appearance().scrollEdgeAppearance = appearance   UINavigationBar.appearance().compactAppearance = appearance   UINavigationBar.appearance().compactScrollEdgeAppearance = appearance