How is location sent in Facebook Messenger?

Question

Windows phone

Here I have installed Facebook Messenger on my smartphone running Windows Phone. There, next to the text input field, there is a dot that supposedly allows others to see where you are. I don't understand - how exactly does she allow this?
Here is my interlocutor. He has Facebook Messenger installed, but it is installed on Android, and there the geolocation is sent like in all other messengers - you just attach the coordinates, and click "send". How can I send my current coordinates to the interlocutor? If it is understood that they should not be sent, but simply the interlocutor himself can look at them at any time - then, damn it, where should he look at them? In the information about my contact, the interlocutor does not display anything.
PS It would be nice if the answers were visual with screenshots - a screen of the client providing the coordinates, and a screen of the client viewing the coordinates.
PPS Kopets, I would never have thought that I would ask how to use the messenger. I am very ashamed, but this question haunts me!