I thought I heard on a webinar that you could add in your own feature services to the dispatcher map to let the dispatcher search and zoom to your own features when creating assignments. For example, if you are creating assignments to inspect known fire hydrants or light poles, you could search by an id number and then create the assignment.
I opened the details of the *_dispatchers map service, went to Settings, then in the Application Settings, under Find Locations, I added in my feature layer. But it does not show in the Workforce Project web app at all (where I create assignments). The address search bar of the app does not seem to register any of the changes I make on the web map settings.