I created a custom style gallery I use in ArcGIS Pro containing symbols. When I have the Symbology pane open the symbols are only sorted by a default sort order. Even when I change the sort order to alphabetical, they are still in the default sort order. I have even changed the Key names to be alphabetical to no luck. It seems that the default sort order is created as you create the style symbols. The attached image shows that I created the Metro Market and Pier 1 styles first, so now they always appear at the top of the list. It is becoming an issue as I add more styles to the gallery and have to search the entire list because there is no way to sort it alphabetically.
How do you change the default sort order? Edie Punt