The Principle of Contingent Causation: The Impossibility of Infinite Regress.

[Angrboda]

As a Panentheist, I would say that the Totality may indeed satisfy as Necessary Being, however, that is not necssarrily the same as the physical universe. I say that because, the physical universe is a particular thing with particular features which IMHO triggers the princple of sufficient reason.

I'm not sure that you're right there. I believe it was Giordano Bruno who got in hot water for claiming that he thought the universe was infinite. I'm told his thinking was that if the universe didn't go on forever, then it would stop somewhere and then the question is, what is on the other side of that boundary. He could not contemplate that the universe was finite and unbounded spatially because, naturally, he trie to imagine the universe 'within' space rather than the universe being space itself. It's possible that the temporal dimension of spacetime is similar, and that people err in trying to situate the time the universe has existed 'within' a larger timeline. But there is no need to do so for time any more than it is necessary to do so for space. It makes just as much sense that the temporal dimension of spacetime is also finite and unbounded -- rather than being 'in' time, it simply 'is' time.