Load Custom Render before get current position

i am getting one issue in my app.i am trying to retrieve my current position(Using Mvvm) and pass it to my custom renderer but when try to call below code

if (locator.IsGeolocationAvailable && locator.IsGeolocationEnabled) { CustomPinResponse objresponse = new CustomPinResponse(); var pos = await locator.GetPositionAsync(TimeSpan.FromSeconds(5), null); if (pos != null) { double lat = pos.Latitude; double lon = pos.Longitude; objresponse = await App.GoogleApiBALObject.GetPlaceUsingWord(lat, lon, "hospital"); if (objresponse.Success == true) { for (int i = 0; i < objresponse.Data.Count; i++) { ListCustomPins = new ObservableCollection<CustomPin> { objresponse.Data[i] }; } } else await App.dialogManager.ShowMessage(objresponse.ErrorMessage.ToString(), ""); } }

before retrieve my current position my uwp custom renderer call and could not get any data.

my custom renderer is as below

` protected override void OnElementChanged(ElementChangedEventArgs

        if (e.OldElement != null)
        {
            nativeMap.MapElementClick -= OnMapElementClick;
            nativeMap.Children.Clear();
            mapOverlay = null;
            nativeMap = null;
        }

        if (e.NewElement != null)
        {

            var formsMap = (ModifyMap)e.NewElement;
            nativeMap = Control as MapControl;
            customPins = formsMap.Items;

            nativeMap.Children.Clear();
            nativeMap.MapElementClick += OnMapElementClick;

            if (customPins != null)
            {
                foreach (var pin in customPins)
                {
                    var snPosition = new BasicGeoposition { Latitude = pin.Pin.Position.Latitude, Longitude = pin.Pin.Position.Longitude };
                    var snPoint = new Geopoint(snPosition);

                    var mapIcon = new MapIcon();
                    mapIcon.Image = RandomAccessStreamReference.CreateFromUri(new Uri("ms-appx:///Assets/pin.png"));
                    mapIcon.CollisionBehaviorDesired = MapElementCollisionBehavior.RemainVisible;
                    mapIcon.Location = snPoint;
                    mapIcon.NormalizedAnchorPoint = new Windows.Foundation.Point(0.5, 1.0);
                    nativeMap.MapElements.Add(mapIcon);
                }


            }
        }
    }`

Please help me i tried to search on google but not found any proper solution.