Can't send COMPONENT_METADATA message

[anaam-wingxpand]

There seems to be no function for sending a COMPONENT_METADATA message.

I tried using mavutil like the_connection.mav.component_metadata_send(), and I tried using "from pymavlink.dialects.v20 import common as mavlink2" like mavlink2.MAVLink_component_metadata_message(), but in either case the function does not exist.

Therefore, I am unable to see the Actuators tab in QGC.

Any ideas? Where can I find the full source code for each message sending function? Maybe I can write a new function for this message, but I can't find the source code for heartbeat_send() or mavlink2.MAVLink_obstacle_detection_message(), for example.