That sounds like a standard cross gen game...Yep.
Different article: What Does The PS5 Bring To Kena: Bridge Of Spirits? - Game Informer
The game wasn't originally designed with the PS5's hardware specs in mind, but the additional horsepower has allowed Ember Lab to do more within the boundaries it initially established.Of course compromises were made in part of the design and some of those don't need to made for the next gen version. That's standard cross gen like any other game, hardly anything to consider it as a next gen exclusive.
"It's been really nice," says chief creative officer Mike Grier. "We've been on development on PS4 for most of the project, and squeezing it and getting the performance that we wanted out of it was a nightmare. But having done all that, when we went to PS5 it was nice, because we had a good baseline and then we could just add to it and take advantage of the extra juice."