Esri provided a beta version of making custom print layout templates available from the Map Viewer in ArcGIS Online. After following the Configure custom print layout templates directions in this help document the custom templates I made are not visible as template options when I'm printing from Map Viewer.
Does this feature work with an existing print service, or does that need to be blank so the default print service is being used?

These templates are from our print service and not the Layout Template Group

Thank you!