Ah okay! I'm confusing Forbidden West with Frozen Wilds then. I'm only on PC. Thanks!
To sum up - Horizon Zero Dawn was released on the PS4 in 2017. Frozen Wilds was the HZD DLC released late 2017.
Horizon Zero Dawn Complete Edition released for the PC 2020.
Horizon Forbidden West came out for both the PS4 and PS5 early 2022.
There's a Playstation VR2 only spin off,
Horizon Call of the Mountain out soon.
Then there's a Horizon Forbidden West DLC - Burning Shores that will be only on the PS5 & not PS4.
No idea when they will port Forbidden West to the PC.
Supposedly a Netflix series is in the works as well.