Good afternoon, I wanted to ask about a problem I have with the gears 5 models, when I extract them in FBX format the mesh comes out with very marked polygons, I try to make the model smooth but I can't, and I tried everything but it seems not work, please I need your help thanks!

Where did you get the rig? my model comes static mesh only.
Hi, I believe this will solve your problem: -Select the mesh -Go to edit mode -Select everything
From the top menu: -Edge -> Clear sharp And then enable smooth shading in object mode.