Bluetooth signal interference. If you connect a PS4 controller to your PC via Bluetooth and Steam is not detecting it, it may be due to interference.

Learn how to connect your PS4 or PS5 controller to your PC, to determine which games it works with, and to make it work with titles from other platforms.

To get your PS4 controller working with your PC, you’re going to need to decide how you want to connect. You can pair it over Bluetooth if your PC supports it, or you can use a USB cable to keep ...

You can play PC games with your PlayStation controller, but it only works with some games by default, while others will require workarounds.