I am uploading a map from ArcGIS Pro to ArcGIS Online. In ArcPro, I have two classes grouped so they are symbolized the same and show up as just one item in the legend. When I upload the layer to ArcGIS Online, in the classic Map Viewer they are correctly grouped as one in the legend, but in the new Map Viewer's legend they are separate, though they still have the same label and symbology. Is there a way to group them in the new Map Viewer or is this yet another feature that for some reason hasn't made its way to the new Map Viewer from the old version?