If you are leveling with the stabilizer jacks, yes. You need to level side - side with boards/blocks under the tires. Then level front to rear with the jack/landing gear. Then you lower the stabilizer jacks just enough to apply pressure to keep the bounce down, not to lift the trailer.
2021 Ram Limited, 3500, Crew Cab, 1075FTPD of Torque!, Max Tow, Long bed, 4 x 4, Dually,
2006 40' Landmark Mt. Rushmore