Apple released the previous 2C54 firmware update on December 16, 2019 but after reports that it made noise cancellation worse, the company pulled the update. Thus, some users may still be on 2B588.
You can check the firmware version of your AirPods Pro via the Settings > General > About > AirPods menu.
We're not sure what changes Apple has made with 2D15 update; however, pairing and noise cancellation improvements would be great.
There's no sure fire way to upgrade your AirPods to the new firmware but you can try plugging them in to charge near a paired iPhone.
The AirPods Pro retail for $249 but are currently on sale for $234.95 at Amazon and $224.99 at Verizon.
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