In iOS, we can send our current location as a message within a discussion thread on Messages.app.
I am not asking about people already actively sharing their location on an ongoing basis. I am looking for the "Here I am right now" post of current location offered in iOS. The result is a fixed location, an unchanging report. In iOS it presents as an item in the Messages thread, with a map and pin-drop. The user can tap to be taken to the Maps app with that location.