CarPlay + SwiftUI update doesn't work

Hi iOS member,

I have a problem to use a SwiftUI on Carplay.

The swiftUI is not refreshed when @State properties are modified.

Only UiKit views refreshs well, on Carplay.

Is it exists a way to use swiftUI views on Carplay, for example to show a speed of the user on a Map application ?

Thank you for your help.

Here an example of SwiftUI view :

   public struct FakeSpeedView: View {
    
    @State var speed: Int = 90
    let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
    
    public init() {}
    
    public var body: some View {
        Text("Speed \(speed)")
            .onReceive(timer) { _ in
                var newValue = speed + 1
                if newValue > 130 {
                    newValue = 90
                }
                print("FakeSpeedView update speed \(newValue)")
                speed = newValue
            }
    }
}

And here, the ViewController used as rootViewController for CPWindow :

class ContentViewController: UIViewController {

    private var circularProgressBarView: CircularProgressBarView!
    private var circularViewDuration: TimeInterval = 2
    private var speedVC: UIViewController!

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        setUpSpeedView()
        setUpCircularProgressBarView()
    }
    
    private func setUpSpeedView() {
        speedVC = UIHostingController(rootView: FakeSpeedView())
        view.addSubview(speedVC.view)
        speedVC.view.translatesAutoresizingMaskIntoConstraints = false
        speedVC.view.pinEdges(to: view)

        addChild(speedVC)
        speedVC.didMove(toParent: self)
    }
        
    private func setUpCircularProgressBarView() {
        // set view
        circularProgressBarView = CircularProgressBarView(frame: .zero)
        // align to the center of the screen
        circularProgressBarView.center = view.center
        // call the animation with circularViewDuration
        circularProgressBarView.progressAnimation(duration: circularViewDuration)
        // add this view to the view controller
        view.addSubview(circularProgressBarView)
    }
}