I just got my new 2020 RAM 3500 Ltd this week. I had ordered it back in August, and the bed step was not part of the build. They are available, and I did have the dealer install one for me. I don't like that I had to pay out of pocket to get it when it seems like they were including them earlier.
Oh well, it works good and is solid, and I'm happy to have it.
I like it better than the AMP one I had added to my last truck... the Mopar one has a little tab on the side that is easier to kick out with your foot. Also compared to the AMP one, the Mopar one is longer (front to back) instead of being wider. I find the length feels better when you step on it, as it supports your whole foot, not just the front of your foot.
HtH...
B