I don't have the RC2 or PRO 2, but there should be an icon on the left hand side of the screen with a circle and an arrow pointing up in the app flight screen.
Hold the button down for auto launch.
No sticks needed.
.
Hi, Recently sent in Mavic 4 pro with a faulty right front arm (clicking noise) under warranty, Excellent customer service with DJI and very fast turnaround. Less than a week from drop off via Post Office to receiving replacement brand new unit.