Use of overlays in Map Dashboard

I have a short question about current capabilities of the Map Dashboard:

Is it possible to display multiple shapefile overlays over the basemap simultaneously?
Example: Overlay1: EA boundary (polygon), Overlay2: building locations (points)

When I select an overlay, it replaces the previous overlay.
As far as I know one cannot combine point data and polygon data in a single shapefile?

Any advice to achieve this is welcome.
Thank you