According to my research, the G Pro does not have simulated surround sound and relies on the audio processing of your connected device. The G Pro X Logitech G Pro X has 7.1 channel surround sound.
I also had the same problem. The drivers should all be up to date, or you can check in the system settings if there is an error message. That helped me.
Both models can presumably be used on a PS4. The Pro X headset is equipped with Blue Voice and DTS X 2.0, which is not the case with the Pro. The delivery content is also different:
Pro X: Gaming headset, Leatherette ear cups with memory foam, Fabric ear cups with memory foam, External USB sound card, Detachable microphone, 2m cable with integrated volume and mute controls, Mobile phone cable with button
Y-splitter for separate microphone and headphone ports, Carrying pouch
Pro: Gaming headset, Leatherette ear cups with memory foam, External USB sound card, Detachable microphone, 2m cable with integrated volume and mute controls, Y-splitter for separate headset and microphone ports, User documentation
The microphone is plugged into the headset with a simple jack plug. You can ask the manufacturer if there are any spare parts.
In any case, a top headset! ;)