I don't think there's been any official communication from MS, but it seems well-established at this point that Xbox games are required to release both on Series X and S, and with feature parity - except for graphics modes.
Yes, but I said "(or if it is, it'll be like CP2077 on the original PS4/XB1)". I simply can't see the game running very well on 10GB of RAM. Maybe I'm being pessimistic, but that's just what I think.