This template provisions an ArcGIS GeoEvent Server site. It will set up an architecure as shown in the graphic.
If you want your ArcGIS GeoEvent Server to be federated with your base ArcGIS Enterprise, you need to manually do that.
https://gisserver.domain.com/server. The following links go to instructions for Windows operating systems; use the drop-down list at the top of each topic to change to Linux instructions.