Each attribute row in a feature layer represents a geometry(Point, Line, or Polygon). Herewith your concern the districts are associated with multiple contract agreement types. As @PolyGeo shared you can easily get the required outcome using summarize, but that could not be used when you want this for a display.
So, one possible workflow you can follow is to create a multipart feature layer out of the existing unique features(single part).
This can be achieved using the Dissolve Tool in ArcGIS Pro:
Multiple State Names representing Population:
Pairwise Dissolve Tool:
Note: This process will create a new layer, and you can use it for symbolizing features accordingly.