>>44447247We weren't really told whether Arceus is a multiversal singularity, though what we do know of it is that it at least shaped a single universe.
Necrozma is a singularity but there's nothing that indicates its a deity and its biggest influence on the world are the Z stones in Alola and the energy in ultra megalopolis.
They're unrelated unless you headcanon which is what most people care about anyways.
