On the 12th (local time), Apple released new firmware for the second-generation AirPods.
Installing this firmware upgrades the existing 2A364 version to the 2D15 version. Apple hasn’t disclosed any specific improvements, but it is expected that some feature improvements and bugs have been fixed.
Apple released new firmware to AirPod Pro a week ago. It is not known if the new firmware has fixed the active noise canceling (ANC) noise issue that is being raised on some models.