Fikri I have exported the above animated GIF using Spine 4.1.19 with the following settings:
It is true that the skeleton is trimmed when exporting without setting Crop, but I think this is due to the fact that areas outside of the clipping attachment are treated as if nothing is drawn when determining the size for GIF exporting.
Alternatively, you can solve this problem by changing the size of the clipping attachment as follows:
