Elevation data are more and more common.
It is easy to load such data in ArcGIS Pro and to associate it like an "Elevation surface" using the map's properties.
In a Map_3D window, the coordinates of the cursor include the value of the elevation in the corresponding point.
It will be great to have the same with a 2D Map once an elevation surface is defined (a DEM file or an elevation service).
Could be considered also within the coordinates widget of the Portal for ArcGIS.