Hello Thomas, 

First I recommend migrating to the XamGeographicMap instead of the XamMap if you haven't already done so. It offers the same, yet better performance. In addition I also recommend installing our WPF Samples Browser

1. If you don't add any imagery and only add GeographicShapeSeries for each level eg. states, cities, counties etc. then you'll be able to get this desired behavior. 

2. We have a few samples to help you get started. First we have a Drill down sample that outlines each region, state, and county. There are shp files within our samples browser located here:

C:\Users\Public\Documents\Infragistics\2020.2\WPF\Samples\CLR4.0\Infragistics.Samples.Assets\Storage\en\shapefiles\America

But you will need to provide your own shp files, whether that be from a provider online etc.

Let me know if you have any questions.

We have a list of providers on this page:
https://es.infragistics.com/help/wpf/geographicmap-shape-files-reference 

Let me know if you have any questions