https://wccftech.com/apple-will-offer-airpods-pro-firmware-beta-to-developers-for-testing/

Now and then, Apple releases a new beta build of its next-in-line iOS, macOS, tvOS, and watchOS updates to developers. Now, Apple will offer developers the AirPods Pro firmware update beta. The new beta builds will be released sometime in the future. Developers will test the beta builds of the firmware update before it is officially released to the public,

The announcement of the AirPods Pro firmware update beta for developers was made on the downloads page. This is the same webpage where beta builds are available for iOS, iPadOS, macOS, tvOS, and watchOS. Apple states that the beta updates of the AirPods Pro firmware update will allow the development of certain features on iOS and macOS. In addition, the company will enable features like Conversation Boost and Ambient Noise Reduction.