No ESC Calibration Available

Hi! I am very new to this so help would be appreciated. I have a Radiolink Pixhawk 2.8.4 flight controller and have begun to calibrate using QGroundControl. I have installed the Ardupilot firmware as the PX4 firmware doesn’t read any of my Pixhawk’s sensors. Everything seems to work fine but there’s no option to calibrate the ESC in the ‘Power’ bar within the ‘Vehicle Setup’ tab.

Is there an explanation or reason behind this? Is there a way to test if my motor and ESCis working well before the flight?

Edit: I know that there’s a tab called ‘Motors’ that’s used to manually test motor control but it gives me a warning: Unable to determine motor count.