Mission Planner SITL normally downloads and uses code from the current development branch ("master", "latest"). However, you can simulate using the latest Stable branch for a vehicle also, with a little manipulation.
Watch video Running ArduPilot stable releases in MissionPlanner SITL Simulation online without registration, duration hours minute second in high quality. This video was added by user ArduPilot 27 October 2021, don't forget to share it with your friends and acquaintances, it has been viewed on our site 6,962 once and liked it 57 people.