First, head to the Settings menu.
Then navigate to the Devices > Audio Devices.
Select the wired headset for the input and output devices.
Return to the Audio Devices screen and choose the ‘output to headphones’ option. Confirm the option is set to ‘All Audio’.
Return to your active game, press and hold the PS button on the controller until the Quick Options menu appears on your screen.
Click on the Volume bar from the top of your screen. Now you would be able to adjust game and chat volume as per your preference.