Hi and welcome to OSM and the forum

I’m not aware of any Excel-PlugIn for OSM. You might need to build your own appliction for this.

For your request:
Countries, states, counties in OSM are mostly areas (defined by multiple nodes each with a lat and long value), so there is no single lat/lon for them.
“place” is a special key in OSM. You might want to compare your definition of “place” with the OSM-Tag for “place” ( https://wiki.openstreetmap.org/wiki/Key:place )