Shading issue in unity

wierd shading artifacts on the mesh exported from blender to unity,

i think its something to do with the normals but i dongt know how to fix it. i exported in fbx, tried every gemoetry smoothing options no difference

mesh looks fine in blender

Have you checked it’s not a lighting issue inside Unity? Too low a shadow resolution etc? Because the shadows on the ground are also very jagged.