No Joystick Setup option qgroundcontrol

Good morning,
I built the DIY Holybro QAV 250 drone that uses the Pixhawk 4 mini flight control. I wish I could pilot the drone with joysticks connected to my android smartphone. My transmitter is also connected to my smartphone. However, I have no “joystick” option that appears in the setup menu in Qgroundcontrol when I type COM_RC_IN_MODE to 1.
Do you know how I can solve my problem? Thank you in advance for your answers?