symmetry not equal

While working on scales, I found that the brush input was different from left to right. I tried gizmo resetting, remesh, etc., but the brush input is still different from left to right. What is the problem?

Your mesh is either not exactly in the middle (it does look centred in tue images) OR your model is not exactly symmetrical. Cant make symmetrical strokes if the other half of the model isn’t the same. Mirror it in the symmetry tool.