SwiftUI & Mac Catalyst: Sideba… | Apple Developer Forums

SwiftUI & Mac Catalyst: Sidebar is not displayed correctly

I enabled Mac Catalyst for an iPad App and encountered an strange Display Problem of the Sidebar.

Code Block swiftHere is the Link to an Screenshot of the Mac App: https://i.stack.imgur.com/ZnMQ0.png

Code Block swift
Here is the Link to an Screenshot of the Mac App: https://i.stack.imgur.com/ZnMQ0.png

Code:

Code Block swift@State private var selection: NavigationItem? = .start
NavigationView {
    List(selection: $selection) {
        NavigationLink(destination: StartView(), tag: NavigationItem.start, selection: $selection) {
                Label("Start", systemImage: "square.grid.2x2.fill")
                    .accessibility(label: Text("Start"))
            }
            .tag(NavigationItem.start)
        // 4 more Items
    }
    .listStyle(SidebarListStyle())
    .navigationBarTitle("Impfpass+")
        
    StartView()
}

Code Block swift
@State private var selection: NavigationItem? = .start

NavigationView {
List(selection: $selection) {
NavigationLink(destination: StartView(), tag: NavigationItem.start, selection: $selection) {
Label("Start", systemImage: "square.grid.2x2.fill")
.accessibility(label: Text("Start"))
}
.tag(NavigationItem.start)

// 4 more Items
}
.listStyle(SidebarListStyle())
.navigationBarTitle("Impfpass+")

StartView()
}

Question: This Code produces a Standard Sidebar on the iPad, however, as you can see, the Mac Version is looking strange with this angular design. How can I achieve the Standard macOS Sidebar Design?