Have zero Esri basemap styles in my Vector Style Editor in Portal. Is there a way to easily add these for editing?
check with your Organization settings, you may need admin privileges to do this, but check under Organization > Settings then look for Map and Scene, and the section Basemap gallery for maps and scenes, there you can set which basemaps appear in the gallery.
Thanks, @John-Foster . It was indeed an organization setting that has been fixed by our admin.