There is no information about the changes that come with new AirPods Pro firmware. One. Might recall that Apple announced a couple of
new features for AirPods Pro at WWDC keynote. The
iOS 14 adds a new auto-switching feature for AirPods. If you are watching a movie on your iPad and receive a call on iPhone then the AirPods will automatically switch to the iPhone.
Apple has also added a new Spatial Audio feature that is exclusive for AirPods Pro. The spatial audio feature is aimed at offering surround sound experience. It uses directional audio algorithms and is activated when you watch video or audio tracks that support Dolby 5.1/7.1. It is plausible that new 2D27 AirPods Pro firmware will bring the new auto-switching and Spatial audio features. That said, your AirPods Pro should be paired with an iPhone or iPad running the latest iOS 14/iPad OS 14 for the new features to work.