Previously limited to 30 fps, the PS4 game Horizon Zero Dawn is now upgraded to 60 fps on PlayStation 5 with a recent update (version 1.53).
Horizon Zero Dawn, Ghost of Tsushima, God of War and The Last of Us Part II
Better fluidity therefore, and a promise that Sony continues to keep, namely to improve as many games as possible from previous generations when they run on PlayStation 5. Other titles have already been affected by this move to 60 fps, like Ghost of Tsushima, God of War and The Last of Us Part II.
Note that Horizon Forbidden West, the sequel to Horizon Zero Dawn, will be released in February 2022 on PS4 and PS5.