Raster attributes will symbolize using "classify" but not using "stretch"
I am mapping topsoil pH in Pro, using this authoritative ArcGIS Online Image Service (this is from the Harmonized World Soil Database): https://www.arcgis.com/home/item.html?id=0e71d0e63c494d75b2bc897b7515f89a.
The raster has a single band, and the default values shown are the unique ID assigned to the soil group. The raster contains a variety of attributes, such as "Topsoil pH" and "Topsoil Organic Carbon". When I try to symbolize the raster by stretch, there is no option to symbolize by these fields; I can only symbolize based on the unique ID. However, if I use the "classify" symbology option, the "Field" dropdown allows me to choose these fields.
I would like to be able to symbolize "Topsoil pH" with a stretch symbology, and not be limited to binning.
Below are screenshots which might help explain the issue.
Fields can be selected above.
Fields cannot be selected using the stretch option
