I have a 2018 RAM 3500 dually with the air suspension. Never have to worry about level. My previous 5th wheel was a toy hauler - heavy on the front-end. I'd hook up and wait about 30 seconds and the truck would level right up. My current trailer, a 2020 Landmark, although a heavier trailer overall, doesn't seem to affect my truck as much - nevertheless, the truck levels itself perfectly.
BTW, there's an alternate ride height button to lower the bed by a couple of inches. Came in handy when I was towing a trailer that was a bit nose high.