Electronic groupsets in Sensors
Shimano Di2 and SRAM AXS groupsets now appear in Settings → Sensors as Electronic shifting, and you can pair them to a bike from there. A groupset stays on one bike, so once it's paired, every ride it records is assigned to that bike automatically.
A count on Sensors
The Sensors row in Settings now shows how many of your sensors aren't paired to a bike yet. Pair them and the count clears.