Having five trailers (non rv) on the road with 28 tires on the ground and rolling 24/7 for 11 straight years we never rotated a tire on any of those trailers using 14"
/15"/16" and 17.5" mostly LT tires. In this type of work we wear out sometimes two sets a year at sometimes 60k miles per set.
Tandem and triaxle and tandem dual axle trailer tires don't always pivot on the front set or the rear set or the center set. Depends on surface changes and level changes between the truck and trailer.
Watching the wheels on my 16k GN (7k axles) loaded triaxle stock trailer in my mirrors I've seen the last two axles scrubbing or the front two scrubbing or sometimes the center pivots and the rear wheels twist one way while the wheels on the front axle twists the opposite direction.
I also never rotate tires on my old '97 32' rv tandem axle trailer with 16" LT E tires trailer. The first two sets ran just over 50k miles and 7 years before I sell them and mount same brand/type new ones.