by default if you have information about a point (so Latitude and Longitude) you won't be able to plot an area.
To do that you need to load in the script a KML or something with the same info.
Take a look at this blog post: World Mapping File For Qlik Sense Maps (KML Shape and Point)
I found it very usefull in the past, as it gives a QVD with both point and area info (at a country level), that will let you plot an area layer in the map.
If you need something more detailed, you could make your own KML (take a look here Create a KML polygon shape file manually and use it in Qlik Sense) or take a look at Qlik's GeoAnalytics
I hope this helps you