ArcGIS Online webmap doesn't show offline options in settings tab

ANH

Hi,

I am trying to make an offline webmap with a joined view layer which can be used in the Field Maps app. The joined view's original layer already has syncing enabled. However, the offline options don't show in the settings tab of the webmap:

 This has been done before with web maps that were created in the same portal and also with joined view layers. I expected to see this:

 Does anyone know what is missing to allow offline usage for the webmap? 

AYamaguchi_UGRWCD

The only way I've ever created an offline map for Field Maps was using the Field Maps Developer, not from the web map's details page.
See this page under the header, "configure the map to work offline." https://doc.arcgis.com/en/field-maps/latest/prepare-maps/configure-the-map.htm#ESRI_SECTION1_1822CD8DD1E74F08BC4308E03A5677F1

Or this document for a more detailed walk-through. https://www.esri.com/content/dam/esrisites/en-us/media/pdf/implementation-guides/take-your-web-maps-offline-field-maps.pdf

Hope that helps.