Our organization has different enterprise portal environments (PROD, TEST, DEV) with the same utility network feature service name present in each so that data can be restored between environments. When viewing the List By Data Source option in the Table of Contents pane in Arc Pro 3.3.2, the map's layer sources are just under a heading titled sde.DEFAULT (Feature Service Name) with no indication of which portal's feature service you're viewing. If editors begin resourcing layers within the same map (i.e., to preserve symbology because you can't use layer files on subtype group layers), you can inadvertently end up with layers of your feature service sourced to multiple different portals and only realize this by clicking on the individual feature layer's Layer Properties-Source information.
It would be great if there could be a portal indicator added to this view in addition to the versioning and feature service information.
