That doesn't sound right. The UE4 centaur scene involved a male centaur fucking the player. The new ones in UE5 have a male, futa, and female centaur, all of which can have relations with players of any gender configuration. While the male and futa centaur could be made to work with the UE4 animations in a pinch, the female one certainly cannot unless they've also implemented some form of centaur strapon.
Edit: I've confirmed that the new centaur scenes are, in fact, all new. I ran up to them with a test futa character and found that I could be on the receiving or giving end for the futa or male centaur. Apparently haven't played enough to unlock the female one's sex options. The scenes I did find were all using the DSS interface, which means they have far more in the way of animations than the old UE4 centaur fuck did:
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Given that I wasn't able to test the female centaur, I can't speak for how they handled her animations. I sort of assume it's going to involve the player putting on a strapon if necessary, but that's definitely an assumption. The player receiving animation will work regardless of the player's set gender. From what I can tell, all of this is set up exactly as the devs described and will allow player characters of any gender to fuck (Or be fucked by) any of the centaurs.
Edit 2: For context, here are some old screenshots of the old UE4 centaur scene, which is very different from the new ones seen up above:
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