iOS 18 lets you adjust the Adaptive Audio feature which responds to the changing conditions in your environment by cancelling or allowing external noise.
iOS 18 lets you customize adaptive audio on AirPods Pro to allow more or less noise
Adaptive Audio
The next AirPods Max may not support iOS 17’s Adaptive Audio features
The next AirPods Max should arrive this year without support for Apple's latest Adaptive Audio features, according to a sketchy rumor out of Asia.