How to remove shadow from a particular object on a some other particular object in unity

i have a simple setup with a ball and a ring. the ball is bigger than the ring and the ring has a oval shape. So when i make the ball pass through the ring, the ball overlaps a part of the ring which is not desirable.

i don't want to use a second camera and camera stacking, so i use custom forward renderer of URP.

Now i achieved what i wanted. The ring always looks on top of the ball, but the shadow of the ball still falls on the ring which looks wierd. How do i fix that?