How to add a zone

just bought REMOTE:TV how do I add a zone so I can listen on my family room tv?
I can already see ROON on that TV but I can not get sound
Sony Bravia smart TV with YouTube TV / Amazon Fire stick 4K/ Apple TV
the icon is showing and music is playing
my only zones are the ones in my living room
stream via wifi from 2021 M1 mac mini
tried to find the ‘volume’ button on my ROON web page as suggested but where is it in lower right corner?

Probably best to ask here

Have all of the required zones been enable via the Roon core?

The TV:Remote will only show the zones that have been enabled in Roon.

What are your expectations? TV:Remote is a remote only. It is not a zone on it’s own. You can use it to control your existing zones and display via an AppleTV.
You can add the AppleTV on which TV:Remote is running as an Airplay zone via a regular Roon Remote by navigating to Setup > Audio.

other people mentioned it but you need to add the Apple TV as Airplay Zone. the remote TV app will only display what you are playing.