It would be great to see the 3D coordinates widget added to the 3D Viewer Instant App.
This widget? We can look at adding it to the 3d viewer app for the Fall release of Online.
https://developers.arcgis.com/javascript/latest/api-reference/esri-widgets-CoordinateConversion.html
If possible, the 3D Coordinates widget included in Web Appbuilder would be perfect. The elevation or z values have been very useful for displaying elevations of lidar generated surfaces.