The valve body on top of the steering gear is adjustible. Before touching it, jack the front end up so the tires are off the ground. Start the engine. The steering wheel shouldn't move. If it turns by itself either direction, the valve body needs adjusted. They don't get out of adjustment on their own, only if they've been messed with at some point.
If that's good, swap tires side to side as mentioned above.
To eliminate road crown drift, try driving in the left lane (if possible) and see if it still pulls right. The alignment should have a caster split to compensate for road crown. Brain fart right now which side needs less caster. At any rate, it's usually around 0.5° less negative caster on that side.
Retired from 40 years as an auto tech a year ago, and it's amazing how quick you forget certain things.......