Ai generated layer masking

would be great when Ai has genrated a layer asset that we could just edit the mask and kae it transparent so we could move the asset to a diffent part of the image. Yes I know that you can transform each layer asset but would like to be able to make the new asset transparnt so it could be moved and used in a diffent part of a image. Even be able to duplcate a Ai asset to do the same thing.