Missing custom mavlink message at ground station

I have added a new mavlink message in common.xml within Ardupilot. The new set of headers are made available to QGroundControl as well as Ardupilot. When Ardupilot is executed on SITL, I could debug and confirm that the message is sent out from Ardupilot, through the function “mavlink_helper.h/_mav_finalize_message_chan_send()”, however I could not detect the new mavlink message at QGroundControl.

I have seen other query responses saying MaxProxy/SITL might filter out the custom mavlink message. Could someone help me to update the MaxProxy to include the new mavlink message?
Or if there is different solution, please let me know.