Untested idea to handle the native StoreKit in-app Review alert presentation

InAppReviewRequest.swift

NotificationCenter
    .default.reactive.notifications(forName: nil, object: nil)
    .take(duringLifetimeOf: self)
    .observe(on: UIScheduler())
    .filter { note in
        return note.name == Notification.Name.init("UITextEffectsWindowDidRotateNotification")
    }
    .observeValues { (note) in

        print("⚠️ \(UIApplication.shared.windows.count)")

        for window in UIApplication.shared.windows {

            if let controller = window.rootViewController {

                print("🔺 \(type(of: controller))")

                // Count subviews of the windows viewcontroller view not containing ROOTVIEWCONTROLLER.
                guard type(of: controller) != ROOTVIEWCONTROLLER.self else {
                    continue
                }

                for view in controller.view.subviews {
                    print("🔻 \(view) : \(view.subviews)")
                    // If view.subviews > 2 the window is probably presenting a view...
                    for sub in view.subviews {
                      print("🔻 \(sub) : \(sub.subviews)")
                    }
                }
            }
        }
    }