Why am I only getting latitude and longitude fields for Cities and not for Counties?

I have a column of US Cities that I converted to geography, and was easily able to get their latitudes and longitudes. I have another column of US Counties, but there is not field option for coordinates. Any suggestions? Thank you!

ETA: I am using Desktop Microsoft 365 MSO Version 2602 on a Dell laptop. I am a beginner/intermediate user.

The field options for counties are: Admin Division 1, Area, County/Region, Description, Image, Largest City, Name, and Population.