About running SITL EKF state is off

I am running the SITL simulation program, multi-rotor firmware, using the command: ./arducopter --home 34.0226236,116.8734099,30,0 --model quad --uartA udpclient: --defaults …/…/ …/Tools/autotest/default_params/copter.parm
I found on the ground station that the EKF status is all closed and I can simulate flight normally. What is the reason?

This is my flight log:
00000003.BIN (854 KB)