Alesa, to your question re: what is the difference between ArcGIS Online and "APAN ArcGIS Online". APAN uses the latest version of ArcGIS Enterprise (10.9.1) in a Cloud environment on AWS GovCloud with the approval to host data up to CUI with authorization by our Program Office. This means that we are 100% in control of all services with our offering. ArcGIS Online is hosted and maintained by the fine folks at Esri and is not authorized to host anything above unclassified.
If you have any other questions please by all means let us know.
Ryan Waller | GIS Product Owner | APAN