At first It looks like it from the crappy Twitter version but on the pixiv version, the quality is so vastly improved, you can zoom in and look for the artifacts and unless ai gotten so much better it can hide the usual things, I don't think this is
It's generated. The nonsense lingerie patterns, the jointless pinky finger, the index that looks like two fingers layered on top of each other, the massive nail on the thumb, and the locks of hair splitting off then forming back (especially the one forming a loop inside a loop on the lower left) are all common machine errors.