The game is a side scroller, so I would say 60 fps with the 3D ON on firmware 1.0.0-0.
People tend to have this funny idea that because a game has 2D gameplay, it automatically can't be pushing modern systems.
2D games can still be technically demanding. (Trine 2, for example)
DKCR may be 2D in gameplay but a lot of its assets are 3D models.
Bet with Liquidlaser: I say PS5 and Xbox Series will sell more than 56 million combined by the end of 2023.