CompositorLayer C/Objective-C API

The Drawing fully immersive content using Metal guide describes how to use Metal for visionOS immersive experiences, but seemingly requires swift to bring up the required CompositorLayer.

@main
struct MyApp: App {
    var body: some Scene {
        ImmersiveSpace(id: "MyContent") {
            CompositorLayer { layerRenderer in
                let renderThread = Thread {
                    let engine = myEngineCreate(layerRenderer)
                    myEngineRenderLoop(engine)
                }
                renderThread.name = "Render Thread"
                renderThread.start()
            }
        }
}

The ImmersiveSpace scene can presumably be replaced with a call to

[UIApplication.sharedApplication activateSceneSessionForRequest:[UISceneSessionActivationRequest requestWithRole:UISceneSessionRoleImmersiveSpaceApplication] errorHandler:nil]

But is there a replacement for CompositorLayer? Or some other way to produce a cp_layer_renderer?

Perhaps it would be possible to write a small swift helper for this, but given the swift interface for CompositorLayer how would that be tied to an existing UIScene as created above?

@available(visionOS 1.0, *)
public struct CompositorLayer : SwiftUI.ImmersiveSpaceContent {
  public init(configuration: any _CompositorServices_SwiftUI.CompositorLayerConfiguration = .default, renderer: @escaping (CompositorServices.LayerRenderer) -> Swift.Void)
  public var body: Swift.Never {
    get
  }
  public typealias Body = Swift.Never
}