There's no way to know for sure. But he's certainly powerful enough to pluck and play at different realities.

[ Not something your regular run-of-the-mill baddie of the week was capable of, at least. So... for what it's worth, Squalo's perfectly happy to keep calling him Lucifer until (if) they know better. ]

[ It takes him some time to properly curve out the "D". ]

If you're not proud of what you do, might as well not do it.