MISSION_ITEM_INT command for Ardupilot plane using MAVSDK C++

Hi all!
I need to send an altitude change command to an plane drone and a command to go to a location using MAVSDK. Perhaps someone has already done this using C++.
I’m trying to replicate the functionality available in Mission Planner.
I couldn’t find anything like it on the Internet.
Thank you in advance :slight_smile: