Is there currently a way to modify the output symbology from the Locate tool beyond the default circle and letter symbol? If not, could this question be transferred and submitted as an Ideas post or will I have to resubmit it myself? It would be useful to provide this customization feature. Thanks!
Currently, I do not see a way to modify the Locate Tool symbology nor do I see an Enhancement Request on the internals. I did a quick search in the ArcGIS Pro Ideas page and did not see an idea there. I would suggest you create the Ideas post for this item to get visibility with the ArcGIS Pro developers and encourage folks to upvote it as well. All the best!
As a possible workaround depending on your workflow; consider dumping locations of interest out using right click --> Add To Feature Class. This populates a feature class that can then be symbolized, etc., as desired.
