Apple has introduced a new feature called Enhance Dialogue in iOS 18, iPadOS 18, and tvOS 18. This feature uses machine learning to boost dialogue audio and reduce background noise, making it easier for users to hear movie and TV show dialogue. The setting is available on iPhone, iPad, and Apple TV, and can be enabled in the TV app or system-wide settings.

Source: https://www.cnet.com/tech/services-and-software/trouble-hearing-movie-and-tv-show-dialogue-turn-on-this-iphone-setting-on-ios-18/#ftag=CAD590a51e