This is not a customized Type-2 or -3 or -4 uniform, but is the default uniform. I simply turned on the armor visuals while wearing the skirt.
If I switch to another uniform that does not have skirt then the honor guard does display the leggings and boots correctly. This problem only appears when wearing one of the skirts.
At first I thought this might be a feature with the skirt, but like I said this is not one of the customizable sets, it is just the default armor with visuals enabled. So not showing the leggins and boot is a bug.