Creating Mavlink equivalent commands in Mavros

Hi! I’ve just dived into ROS and Mavros to control my copter, previously i used combination of Mavlink, Pymavlink, and Dronekit. I command the copter by creating a message factory with Pymavlink or just using a Dronekit function. I could specify or adjust frames of the movement there, like whether i want to use MAV_FRAME_LOCAL_OFFSET_NED or MAV_FRAME_BODY_NED, etc.

But, in Mavros, i got confused on how to set this parameters, i read from the documentation that Mavros acts as a bridge between MAVLink and ROS.

The question is: Are all the settings or parameters or commands in Mavlink equivalently converted in Mavros, or is there any parameter or setting that is kind of simplified? And how do i do the same commands in Mavros? Thanks in advance!

MAVROS converts some ROS messages (not all) into some MAVLink messages (not all).

So not all MAVlink messages are produceable with MAVROS. You need to extend MAVROS to add support for missing MAVLink messages.