Update, I noticed something I had overlooked before in the content descriptions for the items in the folder. There were two types of Feature Layers: Feature Layer vs Feature Layer (hosted). A Feature Layer is created when you share "Reference Registered Data". These items were from a registered database configured from the data store. This sharing process publishes the Map Image Layer (MIL) and the Feature Layer itself. So you use can use the MIL for read only maps. A Feature Layer (hosted) is created when you share "Copy All Data". These items were from a fgdb that was uploaded to the portal. This option does not publish a MIL. You need to go into the overview page for the Feature Layer (hosted) item in Portal for ArcGIS and then the "Create View Layer" option is available. Hopes this helps someone.
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