In ArcGIS Dashboards, the legend currently shows symbology categories (unique values, classes, etc.) but does not display how many features fall into each category. It would be extremely useful if dashboard legends could optionally include a count of features per symbology group.
For example, if a valve layer is symbolized by Valve Type with categories such as:
The legend could display:
Main Valve (124)
Hydrant Valve (37)