I have done this in real life and received them many times...
To share your location: Open the maps app, click on the location arrow at the bottom left, once the phone has your location (the blue dot on the map), click on it then press the right arrow that popped up and select share location and then decide if you want to share by txt msj, email, fb, etc.
The other person for example just opens the link and it shows on their maps app.
IDK if there is a Siri command for it AFAIK no.
I believe if you both use the friends app or whatever apple calls it you can do this easier, but you both would need the app that no one ever uses though.