The FCC documentation also refers to the HAT002 supporting Bluetooth Low Energy (BLE). However, the existing Switch uses Bluetooth to talk with wireless controllers, so we doubt that Nintendo is expanding the Switch’s Bluetooth capabilities. There are no external changes to the design of the Switch, either. The FCC has published test photos that confirms this, which we have linked below.
Nintendo announced the last revision via a tweet on its Japanese Twitter account, which was then picked up by various outlets. Hence, we would not be surprised if the company does not make much noise about the release of this new revision, either.