How to see which service is in an Area that I want to delete?

I’m cleaning up areas and rooms in the Settings->Areas screen, and there are 2 room that I want to delete. However, each one says “1 service” on the area card.

When I click on the area, there are no service displayed, so I can’t move them to another area.

Is there a way to “expose” the mysterious “1 service” so that I can identify and assign it to another area? I could just delete the area and worry about it later, but I’ll try re-assigning it first.