Bug: When scaling by a negative factor the object gets flipped vertically but not mirrored along the selected axis.

[ScruffR]

Since there seems to be no mirror tool to mirror objects along X, Y or Z (or any combination of them) some 3D modelling tools and slicers allow mirroring by applying a negative scaling factor to one (or more) of the axes.

However CrealityPrint 6.0.2.1574 seems to fail in this regard.
No matter in which scaling coordinate (X, Y or Z) one enters the negative scaling factor, the objecte merely gets rotated 180° along the Z axis but does not get mirrored.