A. 1. Set default subtitle preferences: Go to Settings > Accessibility > Subtitles & Captioning, and enable 'Closed Captions + SDH'. This should set subtitles to be on by default for supported content. 2. Check individual content settings: Some shows and movies have their own subtitle settings. Ensure you enable subtitles for each title you watch.

B. 3. Update the app: Ensure that your Apple TV app is updated to the latest version, as updates may fix subtitle issues.