Hi,
ok, that makes it more elaborate. Nevertheless, it can be done, but you need to “draw” = digitise your shapes in a GIS. If you have Arcgis fine, if not, try QGIS. Create shapes, naming them as you do in your dataset to bind them to the PBI map. Once you have created the shapes, you can export a so called shape file from QGIS. This shape file must be converted, go to mapshaper.org, where you can select to export as topojson or geojson depending on which visual you wish to use. Now it is ready to be used in a choropleth map visual like Shapemap or Filled map. I posted an example before.
Map Visualisation Type in Cohort Analysis Showcase - #3 by MAAbdullah47
Paul