This section takes you through adjusting the left-right volume balance in iOS 13, with pictures of the screen to help.
1. Tap on the Settings icon to open the Settings app, then scroll down and tap Accessibility.
2. Scroll down through the Accessibility settings to the Hearing section and tap Audio/Visual.
3. Now adjust the slider under Balance. Move it to the left to shift volume from the right ear to the left ear, or to the right to shift volume from the left ear to the right.
4. If you struggle with stereo sound in movies, games or music due to missing instruments, voices or effects in your weaker ear, try switching to mono audio. Tap the toggle switch next to Mono Audio and you'll get the same sound output in each speaker, or in each ear if you wear headphones or a hearing aid.