Export the character fbx without rig

I have an issue about my riggied character animations. I bought the character from market place and it is rigged the epic skeleton.
But I need use some Mixamo animations and retargeting dont work perfect. Retargeting deforms the mesh and animation looks not as go as the preview of the mixamo page.
I need to re-rig the character. I quit the epic sketon i will go with the mixamo rig. But i cant export it without rigging. When i exported the fbx, mixamo doesnt ask for auto rig.
Do you have any idea about ?
Thank you for the help :slight_smile: