As for the Qlik Sense Map object Area Layer and ToolTip customization, it is not possible to customize the "Show Label" on the map chart in Qlik Sense i.e. there is no possibility to customize the value displayed by "show label" option.
When adding "Area Layer" to an object map, “Show Label” allows to set a text label with the layer's location on the map.
Here is an example
Environment:
Qlik Sense Enterprise
Qlik Sense Desktop
Resolution:
This functionality will not be implemented (not on the Map Object road map).
Try with the Map extension of Qlik GeoAnalytics.