Create a Legend for Extruded Field

[WilliamBryan]

Hello! I am creating a multivariate choropleth map in ArcGIS Pro, with one variable represented by a Graduated Color scheme with 5 bins. Rather than using a multivariate color scheme to represent both variables, I decided to extrude the other variable in a 3D Scene. I used the other variable as the Field for the extrusion, which produced the map below.

I still have some cleaning up and everything to do, but is there a way to include the new elevation data (based on the selected data field) in the legend? Right now, only the graduated color scheme is shown in the legend, but if there's a way to include the new elevation data that would be helpful. Thanks for any help you can provide!