Some could be setup, some could be alignment.
Much is expectation or lack of understanding.
And FWIW, I’ve seen more than one Ford E350 chassis cab that came from the factory looking like a pigeon toed, knock kneed victim of palsey.
Idk why. But they do. Buddy has a couple newer E350 short wheelbase box vans for his business. They look like a blind monkey with a rock and hammer could have aligned them better.
He only uses them for local travel and they drive like .... he don’t fix em because he hates Fords and enjoys Showing off how bad they are, lol. And he got them with the business so no choice in the matter. I’m talking rotate the tires outside in on the rims every 10k miles because they eat front tires so bad.
So it’s entirely possible the OPs RV is off from the factory. But lack of understanding doesn’t help fix it.