Yes, you can make an app like that.
What have you tried? You can search the community for Map CloudDB or Map FirebaseDB for examples.
Here is part of what you want to do How to broadcast a GPS location and share the information on a map with others in real time..CloudDB
and perhaps this Social Distancing ... a CloudDB / Location Marker Tutorial
Is this what you hope to build? A CloudDB works similarly to a FirebaseDB. Substitute the FirebaseDB controls to the above examples and you might have what you want to do.