CLose captioning in the Starz app on Apple TV
I turned it on through accessibility on Apple TV but it will not work. Can't find anywhere to turn it on in the Starz app. And Siri has no clue how to do it either.
Question marked as
Contact Starz about the accessibility features available through their app.
How to contact an app developer - Apple Support
Also have a look at the subtitling options during playback.
Change subtitles or languages for videos in the Apple TV app or iTunes Store - Apple Support
It may look slightly different in non-Apple apps, but similar options should be available in a similar way.