This video shares a few tips to easily create a drilldown map with A Drilldown Dimension using multiple map layers of different types - Area and Point.

Blog:
https://community.qlik.com/t5/Design/Tips-and-Tricks-Creating-a-Multi-layer-Drilldown-Map-with/ba-p/2077873

Qlik Help - Drilldown Dimension:
https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Sense_Hub/Dimensions/create-drill-down-dimension.htm

Qlik Help - Map Chart
https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Sense_Hub/Visualizations/Map/Map.htm

Playlist: https://www.youtube.com/playlist