To make LODThe Level Of Detail (LOD) technique is an optimization that reduces the number of triangles that Unity has to render for a GameObject when its distance from the Camera increases. More info
See in Glossary transitions smooth, enable LOD cross-fading. For more information, refer to Introduction to level of detail.
Follow these steps:
Enable GPU Resident Drawer.
In the Universal Render Pipeline (URP) Asset, enable LOD Cross Fade.