How to change the Type of Map to be Public Transport? I want to see a public transport map. Thanks

I tried to make a background tasks action, however, it seemed not working at all! I can be able to register the bg fetch but cannot having a perform of bg fetch. Can anyone help me? I also add background modes in the capability. Here's my code: import BackgroundTasks import UserNotifications //BusArrNotification @main struct SGPublicTransportApp: App { init() { _ = BackgroundTaskHelper.shared } @UIApplicationDelegateAdaptor(AppDelegate.self) var delegate @Environment(\.scenePhase) private var scenePhase @AppStorage("BookTime") private var BookedNotificationTime: String = "" @AppStorage("specificBusService") private var specificBusService: String = "" @AppStorage("specificBusStopCode") private var specificBusStopCode: String = "" var body: some Scene { WindowGroup { NavigationStack { ContentView() } } .onChange(of: scenePhase) { phase in switch phase { case .active: print("Active") if !BookedNotificationTime.isEmpty { let dateFormatter = DateFormatter() dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss Z" let time = dateFormatter.date(from: BookedNotificationTime) let diffs = Calendar.current.dateComponents([.minute, .second], from: Date(), to: time!) if diffs.minute! <= 0 && diffs.second! <= 0 { specificBusService = "" specificBusStopCode = "" BookedNotificationTime = "" } } case .background: print("Background") case .inactive: print("Inactive") @unknown default: break } } .backgroundTask(.appRefresh("BusArrNotification")) { context in // Perform the background task here. await BackgroundTaskHelper.shared.scheduleBackgroundAppRefresh() // let _ = await BackgroundTaskHelper.shared.performBackgroundRefresh() print("HELLLO") } } } class BackgroundTaskHelper { static let shared = BackgroundTaskHelper() @ObservedObject var busDataService = BusDataService() private init() { // BGTaskScheduler.shared.register(forTaskWithIdentifier: "BusArrNotification", using: nil) { task in // self.handleAppRefresh(task: task as! BGAppRefreshTask) // } } func handleAppRefresh(task: BGAppRefreshTask) { scheduleBackgroundAppRefresh() task.expirationHandler = { // Handle the expiration of the background task } // Perform the task let isSuccess = performBackgroundRefresh() if isSuccess { task.setTaskCompleted(success: true) } else { task.setTaskCompleted(success: false) } } func performBackgroundRefresh() -> Bool { // Implement your background refresh logic here busDataService.fetchBusData() print("*** Background refresh performed! ***") return true } func scheduleBackgroundAppRefresh() { let request = BGAppRefreshTaskRequest(identifier: "BusArrNotification") request.earliestBeginDate = Date(timeIntervalSinceNow: 10) // 15 minutes from now do { try BGTaskScheduler.shared.submit(request) print("*** Scheduled! ***") } catch { print("*** An error occurred while scheduling the background refresh task: \(error) ***") } } }