Herelink Joystick Control

Hello! I am currently looking at using Herelink controller to control my robot using wifi (without the air unit). Right now, I can use the buttons to activate different functions on my robot. However, the joysticks does not seem to work and I can’t find a way to map the joysticks on QGroundControl. Is it because the joysticks command can only be sent through 2.4GHz radio?

Any help will be greatly appreciated!