Until a built-in autopilot gets added, qazme (@QazmeHabu) has added a basic autopilot for the Caribou on flightsim.to. It’s is extremely helpful! Here is the description:
This adds a basic autopilot to the Microsoft Local Legends DHC-4 Caribou. You will either need to know the keyboard binds, have a control panel (like the paid PMS50 GTN750), or a hardware device to control the autopilot. There is no included control panel .