Auto smooth is off and I can’t find anything in the render settings (Couldn’t find anything reason might be that I don’t know what i’m looking for in the render settings lol)
So I’m not too sure on how all the modifiers work. But if I were you I’d select everything, export it then re-import it without the rig system but rather just the body and accessories. Just make sure your position is the final position you want.
(In order to do this shift click on everything except the rigging system. Then file>export then re-import it into a new blender file.)