DN said the Hands are of the same "species" as Perpetua:
https://ibb.co/RbdKgD0
And the Hands' primary function is evidently to create multiverses:
https://ibb.co/Kmg2nXD
(...or eliminate them, depending on the circumstances.)
So they are probably what Perpetua would have become if she hadn't gone rogue and side-stepped her primary function... Which is in-line with JL#22, where Monitor theorized that Perpetua's function was to create the mainstream multiverse, and either die, OR move on to create other multiverses within the omniverse:
https://ibb.co/HDwX4ZM
So imo, the Hands are ~ Perpetua individually.