Andrew, that is the text that I've relied on for past versions of Pro and gives rise to my question since genus no longer seems to work. Is genus not working because it is not included in the name field shown below? Is this what my field is being matched against? If so, it makes sense that only common name in my attached shapefile would work. I checked an older version of Pro (2.9) and the properties look exactly the same for this tree, yet it can match using genus field or combined genus/species field. Version 3.0 only works using the common name field.
I also noticed the Match Layer Symbology to Style doesn't open the dialog to do this, so I end up running the GP tool from the toolbox.
Would you be willing to test this using the attached shapefile?