Shadow Issue on an imported FBX file from Blender

Well i have imported this cube model from Blender (uk making multi textured objects are more simple) and i exported it as an FBX file and imported it in UE5. I have this “shadow issue” and idk how to fix it ;( anyone have a solution ?

(i belive it’s directly from the material bcause it have this dark effect on it)

Hey, can you attach the FBX file? I’ll have a look