Just looking at the list now and they only have 20 brands listed as attending, and many are missing. I don't see:

Alfa Romeo
Acura
Audi
BMW
Buick
Cadillac
Fiat
Genesis
Hyundai
Infiniti
Jaguar
Land Rover
Lincoln
Lucid
Mazda
Mercedes-Benz
MINI
Mitsubishi
Porsche
Rivian
Tesla
Volvo/Polestar