just realized what the title means
Naru wanted to be a hunter, like her brother, who specifically hunts dangerous predators.
In the first two films, the Yautja was the only true hunter, and thus the "predator" in the title.
In "Predators," it was clear that the Oomans were specifically chosen for their killer instinct, meaning the Yauja and Oomans were all predators, though not all hunting
But this film is about Naru and Taabe hunting the Yautja while it hunts them.
So the humans and the alien are all "prey" in this film.