Originally, I was considering the Mopar Bed Step but felt it was WAY too overpriced. Heck, for a couple hundred dollars more, you can buy an aftermarket rear bumper with the steps built in. I had one on my 2015 Ram Sport and worked/looked great.
Anyways, I was Christmas shopping for myself online and found one of these:
Tailgate Ladder, easy to install, deploys in a couple seconds and when not in use the Tailgate Ladder folds neatly against the tailgate.
traxionproducts.com
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It was a no-brainer for $35.88 on Amazon. Probably one of the best "cheap mods" I've done on my 2019 Rebel.
Works well, is easy to install and is very sturdy. I have two undercover swing cases and a Peragon hard bed cover. The tailgate ladder clears both and the support cable for the tailgate.
It's a great alternative to the overpriced Mopar bed step.
Hope this helps!