Describe problem solved by the proposed feature

During the QGC 5.0 test, I discovered the MAVLink 2 signing feature. However, after exploring the PX4 side, I couldn't find the module to support it. It would be ideal if PX4 supported MAVLink 2 signing. (Or is it available, but I am missing the information?)

Describe your preferred solution

MAVLink 2 signing is supported by PX4.

Describe possible alternatives

N/A

Additional context

No response