How could it be otherwise?
For a universe to be created from something would be impossible – the something would, by definition, be part of the universe. There are only two possibilities:
- Universe always existed (eternal inflation)
- Universe created ex nihilo. (Yes that means creation of everything, including spacetime, from absolutely nothing.)
Both are consistent with what we know of physical law[*] and imply a zero-energy (observable) universe.
[*] okay, the universe is not consistent with baryon or lepton number conservation, but no one expects that to be a fundamental law. Soon to be superseded by Baryon − Lepton conservation.