Kibana Maps world countries does not have names

I chose Data source EMS Boundaries Layer [world_countries] , when I added a new layer to the map. The map does not contain the country names. Please check the attachment. How do I display the names? Thanks.

Think of these as Stacked Layers with Opacity...

Thank you. I added base map as an additional layer, then the names popped out.

You can also enable "Show labels on top" in the EMS base map layer to display labels above world countries