I can confirm that on Xbox Series X the issue is still present with SU11. Small changes need lots complete rotations of the trim wheel. Alpha these rotations need to be slow due to the nature of the encoder in the trim wheel. Still unpredictable what amount of rotation gets me what trim value in the sim.
Having a similar issue when rotating the auto pilot increase decrease knob. One discrete click on the knob does not correspond to one increment or decrement of any value in the sim. Sometimes it’s one click, sometimes 2 and sometimes even three clicks. Setting values with this feels really sluggish and needs some time due the unpredictable changes.