Unity | HoloLens 2 - MouseEventsWebView.MouseEvent does nothing?

Question:
I have WebView2 set up in my Unity project. Now I would like to transfer my clicks from a canvas to the WebView. However, nothing happens after passing a WebViewMouseEventData. Did I forget something or do I have to update something again myself?

I have read the following article and at the end it roughly shows how to do it.

And even if I send wrong coordinates, I would have to send randomly usable coordinates at some point so that something on the web page gets clicked. But that doesn't happen.

Does there need to be more done than just handing over the MouseEvent?

My Setup:

        public void OnPointerClicked(MixedRealityPointerEventData eventData)
        {
            var result = eventData.Pointer.Result;
            if (result.CurrentPointerTarget.layer != 30)
            {
                Debug.Log("OnPointerClicked>layer != 30");
                return;
            }

            var clickPosition = result.Details.PointLocalSpace;
            var x = (int)Math.Ceiling(clickPosition.x);
            var y = (int)Math.Ceiling(clickPosition.y);
            Debug.Log("OnPointerClicked > X: " + x + " Y: " + y);

            var mouseEventsWebView = _webView as IWithMouseEvents;
            WebViewMouseEventData mouseEvent = new WebViewMouseEventData
            {
                X = x,
                Y = y,
                Device = WebViewMouseEventData.DeviceType.Pointer,
                Type = WebViewMouseEventData.EventType.MouseDown,
                Button = WebViewMouseEventData.MouseButton.ButtonLeft,
                TertiaryAxisDeviceType = WebViewMouseEventData.TertiaryAxisDevice.PointingDevice
            };

            mouseEventsWebView.MouseEvent(mouseEvent);
        }