I’m making a 3D character in blender who has a hood over his head and I positioned the light in blender so you wouldn’t be able to see his face because of the shadow of the hoodie, if I import this model into unity will the light effect that I used in blender be removed off the model.
Lighting is not needed as part of your Blender character export set. Your Unity scene lighting will determine if the hoodie hides the face (yes, the blender lighting will be replaced by Unity).