Jagged shadows on mesh import

Hello, I am working on a cinematic project, and I am getting terrible quality in the shadows of one specific object.
I realized that even when I open the mesh visualizer I have these really bad shadows.
I tried importing the object on a bigger scale, it is helping in the visualizer but I have exact same result on the viewport…
I have also tried changing the value of the r.Shadow.Virtual.ResolutionLodBiasDirectional command, and it is not really helping…

Here is a screenshot of how it looks in the mesh visualizer after importing:

Does someone here have a solution to this problem ?

Best