Why is makeCoordinator() only called once? - swift

Question

The ARViewContainer has a coordinator, which is created once by makeCoordinator() -> Coordinator. A print("makeCoordinator()") in that method shows me, that it is only called once. It is the first print in the debug console. I also have a print("init") in the initializer of ARViewContainer, which is called many times according to the debug console.
Why is the ARViewContainer created many times (as expected, because the ContentView calls ARViewContainer() in its body), but the coordinator is only made once?
import ARKit
import SwiftUI
import RealityKit
struct ARViewContainer: UIViewRepresentable {
init(coordinator: Coordinator) {
print("init")
}
func makeUIView(context: Context) -> ARView {
let arView = ARView(frame: .zero)
let config = ARWorldTrackingConfiguration()
config.planeDetection = [.horizontal, .vertical]
config.environmentTexturing = .automatic
if ARWorldTrackingConfiguration.supportsSceneReconstruction(.mesh){
config.sceneReconstruction = .mesh
}
arView.session.run(config)
arView.debugOptions = [
.showWorldOrigin,
.showSceneUnderstanding]
arView.session.delegate = context.coordinator
return arView
}
func makeCoordinator() -> Coordinator {
print("makeCoordinator()")
return Coordinator()
}
}