If you specify a Unique symbol for a hosted feature layer of point data as a Vector Symbol, Shapes (and in my case, I chose Star 3) and use this feature layer in ArcGIS Online for Creative Cloud (specifically, as of the time I'm writing this post, v 3.8.0. and on Illustrator 29.3.1), the map will not sync via the extension. It doesn't just not sync that feature layer, it blocks all other layers from syncing, so no map will generate unless that feature layer is removed.