Screen Monitoring on a TV using the Smartthings app?

This article:

mentions that you can have your Samsung TV monitor your smartphone using the Smartthings app.
“Existing solutions for displaying the screen of a mobile device on a Samsung TV (and vice versa) include Samsung’s AllShare Cast service, as well as the SmartThings app that comes with a built-in screen mirroring feature.”
What are they talking about? How is this done?

Isn’t possible through the ST app on iOS as far as I can tell. Airplay works for this if you have a model that supports it.

I know that I can do this through Chromecast and other methods.
I was curious about the statement that it can be done though the Smartthings app.
I haven’t seen a way to do that. Maybe through the new version of the app, or an app on the TV?

Maybe with the new app android version. I’m using iOS new app.