Group template for layers in AGOL

[AlfredBaldenweck]

Kind of related to this Idea, and a way I think it could probably be implemented. Create Buffer/Geofence Around Points in Field Maps - Esri Community

In short, I would like Map Viewer to have a group layer tempate.

In Pro, you can use group templates to create multiple associated features from different layers at once. 

I would like to do this in AGOL (and then in FieldMaps) to speed up the editing process, as well as do some of our data processing in advance; no need to manually buffer when you can populate the associated feature class automatically when you place the site.

[SergioSalmeron_NTT]

In addition to AGOL, also for Argis Enterprise with the JS widget editor

[rohanrajan_hms]

I actually came across this error while trying to publish a web layer with Group Template, 24081: Group templates are not supported—ArcGIS Pro | Documentation. But, in ESRI UK's Utility Network Editor demo video they display a group template option but did not create any features. I don't know how they achieved it. @GlenOlliEsriUK @BenWalker