I am trying to have a map thumbnail show in my published survey. Currently, there is only a crosshair and map icon with the question. Is there something I can change in my Survey123 Connect form to display the thumbnail?
That's the GPS and Basemap selection tool, that you'd usually see alongside the map.
Do you want a thumbnail? I don't think that's a thing within the form... Maybe you'd get it if you were changing the Basemaps and the map/thumbnail was one of the options.
Are you trying to add a custom map to your form? More info on that here:
If the map is just not working, can you share your form or provide more info?