Gotham Knights came out with a few issues here and there, one of them being about the performance. A lot of players complained of these problems, and developers are totally aware of it. After the initial patches to PC and consoles, team is working on a larger patch to solve performance issues and bring the best experience to players.
Gotham Knights is released for PC, PlayStation 5 and Xbox Series X. The biggest disadvantage for console players is that they can not raise the FPS over 30. This is already sad enough on its own, but adding the performance issues makes it way worse than it already is.
While Gotham Knights seems fun, those problems are sabotaging the game for many players. These patches will hopefully take care of those issues and allow people to enjoy a much smoother experience.