I print BJD mostly and very often I need to mirror the body parts, but there is no mirror option when I select multiple objects.
I can get away by grouping them all together then mirror, and split them up afterward, but in this case the transform and painted supports are also gone and I need to redo it.
On prusa slicer I can very easily select multiple objects and go to lower right corner and flip them on the axis that I want, and all transformation and supports are still there. Since bambu slicer is base off prusa slicer, I am surprise to see that this option is still not available after years.