Well, if you follow the rabbit hole to the bottom, the Presence is Elaine Belloc.
Basically, the (original) Presence had a retirement plan, where instead of creating everything by themselves ( which they were perfectly capable of doing ), they gave the power to create stuff ex nihilo to Michael, and the power to arrange and rearrange stuff to Lucifer, and these two actually implemented the universe, Lucifer being the one creating suns from the matter and energy created by Michael.
Before exiting the universe, Lucifer gave his transmutation power (and the lightbringer title) to his long-term aide/paramour Mazikeen. Of course, now, post-flashpoint, Lucifer is back...
But, this is not relevant for WTR, since MrZoat hadn't read any of the Lucifer comics, so it's possible that in WTR Lucifer is still operating a night club in LA... Except, I think there's another fallen angel called 'lucifer' in New 52, which presumably happens in the same multiverse.
Anyhoo,
Presence (New Earth)
In-universe, he's
sort of the abrahamic god, except that not in a way that most religions get correct. Also, 'reality' is somewhat subjective, since what people believe occasionally comes true in DC.
I don't think it was ever directly stated that the Presence was responsible for creating any other universe except for the DC Vertigo one, so there's that...
Yahweh - Wikipedia, the free encyclopedia
The religion wasn't originally about an omnipotent creator, nor was it monotheistic, so yahweh and such may be in their own little dead pantheon at this point. I think it was around Moses's time, that it was revealed that Yahweh was also El, maybe because of the confusion over which one of them was married to Ashearah.
Yes, God is married.
Basically, even if what 'modern' religions worship - the omnipresent, omniscient creator - is The Presence, that's not really the same god that was worshipped by various desert-dwelling nomads.