UIHostingController question...

I have a SwiftUI view that works as expected in a full SwiftUI context. But I now need to use it in a UIViewController. It mostly works, but I'm trying to expose an @State var out to the viewController, and it only ever returns the initial value. Any guidance for how best to pass out this @State var? I could make it be a binding, but in my pure SwiftUI code, it works fine as @State (ie EditorView's container view does not need to know about sliderVal)

thanks, in advance, for any suggestions

import SwiftUI
import UIKit
class ViewController: UIViewController {
    var host: UIHostingController<EditorView>?
    override func viewDidLoad() {
        super.viewDidLoad()
        host = .init(rootView: EditorView())
        guard let host = host else { return }
        addChild(host)
        host.view.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(host.view)
        host.didMove(toParent: self)
    }
    @IBAction func helloTapped(sender: UIButton) {
        guard let sliderValue = host?.rootView.sliderVal else { return }
        print("UIKit sliderValue: \(sliderValue)")
    }
}

struct EditorView: View {
    @State var sliderVal: Double
    init(sliderVal: Double? = nil) {
        _sliderVal = State(initialValue: sliderVal ?? 7)
    }
    var body: some View {
        VStack {
            Slider(value: $sliderVal, in: 1...10)
            Text("sliderVal: \(sliderVal)")
        }
    }
}

(NOTE: in order to see this code snippet in action you will need to create a button in the storyboard and link it to helloTapped)