x2 I just put a little up and in pressure on it with the outside of my shin and it snaps closed.I have found with both the center and driver side steps. When you push them in if you have a slight up push it goes in like butter. if you are pushing down at all they want to stay out which is a great thing if you are trying to step on the step getting out of the bed. I use the side of my leg usually and just nudge it at slight up and back angle and it moves in with no issue. This worked with my 2019 and still works with my 21 with MFT.
x2 I just put a little up and in pressure on it with the outside of my shin and it snaps closed.