Sony didnt buy a 1% stake in Epic Games for nothing. Console version of EU5 probably being built from the ground up on PS5 and all Epic games will likely utilize PS5 hardware features such as haptics and activity cards if I had to guess.
While that is all probably true, I think it is mainly for Fortnite and any other "Event Platform-Service Game" they are working on. They want to do more with Epic's audience reach, and its probably why they made Travis Scott a PlayStation influencer (Epic was already working with him).