https://blog.ulalaunch.com/blog/goes-t-meet-rocketship-ulas-vessel-that-makes-deliveries
of the 2 blog images shows the Atlas being removed from the ship, with the other half of the hold empty. I assume that the Centaur stage was previously removed?
This launch is using GEM-63shttps://twitter.com/northropgrumman/status/1483535763232935936