Yeah! It is enabled, but no buttons.
Also the user & password is lower than in ventura and olders.
Also the loading black screen with an Apple has different behavior with two screens. Later first you see the apple bar in one screen, then goes to the other screen, but in Sonoma just you see the loading bar in one screen (and is faster)
I have two partitions, one with ventura, and the EFI is the same. But the behavior is different, the unique change is in Sonoma's side about the patches for 23.0.0.