The PS5 Doesn't Support Audio Accessories.

Like the PlayStation, 4 the PlayStation 5 is restricted in what method Bluetooth wireless audio can be utilized due to latency in the audio stream using random Bluetooth headphones. Also because to use actual Bluetooth headphone they want you to purchase their headphones. The main way to connect still is to connect headphones using the 3.5mm headphone jack located on the controller and enabling the controller to output audio in the settings menus.