Yes, a fantastic example is M4's Hobbit edit. He had a friend do a deepfake model based on some of the characters' unblemished faces, then applied it to footage later in the story where their faces showed injuries that didn't happen in his edit but had happened in the theatrical films. Thus removing an inconsistency created by the fan edit. He comped in only the changed parts so it's seamless and not junky low resolution.
It's extremely tastefully done and clever use of the tech specific to fan editing. I pegged it as not even a deepfake initially. It's not just trying to swap an actor out with a cheesy facsimile of another actor's face.
@M4_