Prototype SRAM AXS Drivetrain at World Champs 35

There is a prototype SRAM drivetrain spotted at World Champs in Les Gets. The most interesting feature is how the derailleur is mounted to the bike with what looks like an updated UDH interface. The cassette is still 12-speed and the derailleur uses the same AXS battery with a large jockey wheel. What else do you notice?