The driver mentions Arctic Sound features Gen 12.5/Xe Graphics and there's also something called DG2 that uses Gen 12.7/Xe Graphics.
Interestingly, the Twitter feed from KOMACHI_ENSAKA also contains some speculation that Rocket Lake may feature a 14nm CPU in combination with a 10nm graphics part.
RKL = Gen 12 Graphics.
— ?????????@Komachi (@KOMACHI_ENSAKA) July 29, 2019
DG1 = Gen 12 Graphics.
LKF-R = Gen 12 Graphics (?).
RKF = Gen 12 Graphics.
Arctic Sound = Gen 12.5 Graphics.
DG2 = Gen 12.7 Graphics. pic.twitter.com/w9HYMqtegw