It is possible to play backward-compatible PS4 games on a PS5 using a PS4 controller (DualShock 4). Because native PS5 games make use of the DualSense controller's sophisticated features, such as haptic feedback and adaptive triggers, it is incompatible with them.
Yes, you can use a PS4 controller on a PS5, but only for PS4 games. It won’t work with PS5-exclusive titles, as those require the DualSense controller for full compatibility and features.
