The measurement values in millimeters do not match

That is usually caused by your steps being off. In the console window type $$ and Enter key. Post the output here for review.

Hello, I have a similar question to yours. For example, I tried cutting 30 x 30 millimeters and the machine cut it to approximately 32 millimeters. If you could provide me with any help to solve it, I would greatly appreciate it.

have you used the axis calibration ?
Edit–>Machine Settings “calibrate axis”