We are more than six months past the first license date of Dexos 1 Gen 3 (9/1/21) and the list of approved oils remains relatively short. Most notably, all flavors of Mobil 1 are missing from the list and PP only has 0W-20 on there.
Originally, it sounded like there was a lot of crossover between API SP and Dexos 1 Gen 3, but the slow rollout makes me wonder if formulation changes were required to meet the new performance objectives.