I cannot connect my Bluetooth hedaset to my Razer Raiju Tournament Ed properly

I am currenty using following hardware: - pc with windows 10 - razer raiju tournament for ps4 (with bluetooth or with USB connection) - Sony headset WH XB700 (with bluetooth or with cable connection) When I play Fortnite with my friends I can hear them wearing my headset, but they cannot hear me. If I do not use the razer raiju, but the mouse and the keyboard instead everything works fine and they can hear me. How can I connect my headset properly to the controller? Thank you!!!!!