Leaderboard Map Strider Locations

I’m pretty new and curious as to how the location of striders is set on the leaderboard map? Does it only show people above a certain place? Is there a setting somewhere to add your location pin?
Thanks for the help.
My profile link : Steven Gravatte - CityStrides

The markers are only public accounts (privacy set to “Everyone” or “Per Activity”). It uses your default city, which is selectable in Settings

Thanks! I was able to find myself near the city center and my friends near the city center.

Yeah, I add some jitter to the GPS for each marker so that multiple people in the same city should still be viewable on the map.