SwiftUI iPad Landscape Only

@Apple How do you set an iPad swiftUI app to Landscape only seeing that the Xcode supportedInterfaceOrientations flag is ignored by swiftUI.

The following doesn't work via the UIApplicationDelegateAdapter when the 2 methods are implemented.

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
            .landscape
        }

      func supportedInterfaceOrientations(for window: UIWindow?) -> UIInterfaceOrientationMask {
            .landscape
        }