For the Special Event Operations solution deployed on AGOL, I want to add to the list of "Special Event Assets" accessible through the Special Event Site Map (web app below).

I added my desired value to the domain of the "Event asset type" field in the "Special Event Assets" layer:

I then opened the Special Event Site Map web map, opened the styles for the "Special Event Assets" layer, added the new value to the group, and assigned a symbol to the newly added domain value. I expected this to add the new value to the edit widget in the web app, but it did not.
Am I missing a step?