ArcGIS for Power BI doesn’t support geocoded locations when publishing to the web, i.e. it only works when you provide the latitude and longitude.
This rules out any kind of area map.
We have found the following information:

We have been told that this is a known issue and the Esri product team in the US have it on their roadmap for 2021. As we are now in Q3 of 2021 does anyone know if this issue will be resolved soon please?
With thanks.