No, you cannot use the PS5 DualSense controller with the PS4. This is because the controller would need to be paired up with the PS4 via a USB-C connection port. The PS4 sadly doesn’t have a USB-C ...
How To Fix Your PS4 Controller Syncing Issues. DualShock 4 pairing and connecting issues PS4. Your PS4 controller won’t sync with your console and you’re trying to work out why it won’t connect.