Hello,
Apologies for the delay. StaticMeshComponents with a WPO Material and “Evaluate World Position Offset in Raytracing” enabled should cast ray-traced shadows in UE Main and UE 5.6. InstancedStaticMeshes should also support this in UE Main and UE 5.6 , but be sure r.RayTracing.Geometry.InstancedStaticMeshes.EvaluateWPO=1 (all with WPO) or -1 (only those with WPO enabled), by default it’s 0.