How to make viewportFraction applied to all sides

[safoelc252]

When I used viewportFraction=0.8, the adjustment is only applied to the left and right side of the item.

Is there a way to adjust the top and bottom side as well? The problem is that the bottom shadow of my card is clipped by the border of the Swiper() widget. Clipping still happens when I enclose my Swiper() with a Container() with top and bottom paddings.