Eh, I could imagine something like, a hall showing various universes within bubbles, with many visually twinkling with stars and galaxies, and one under attack by a certain threat being visually empty.
I don't think "This blast will destroy the galaxy" and "This blast will destroy the universe" are meaningfully different in terms of whether one could leave neutron stars behind or not, and I don't think we'd ever use that possibility to prevent the latter from being 3-A.
Also, from the destruction method we suppose, it seems like it would leave things behind. We envision an omnidirectional blast of energy, whose density at the edge is high enough to impart a neutron star's GBE across its surface. Where GBE is the energy such that, applying varying amounts of it to successive shells of an object, would cause it to never reform under its own gravity.
An omnidirectional blast can't really apply this energy selectively in this way; I'd expect many things on the edge to be blown apart but ultimately reform. This doesn't typically matter, but with strong claims like "something that leaves even a single neutron star behind doesn't reach the level" I think this particular does.
Not for choosing the baselines, but for reconsidering how we place creation into that system.
To verify whether your guesses about the probabilities in play are correct.
You think there's a small chance that a neutron star would be at the edge of any given galaxy, but that there's a nigh-certain chance that a neutron star would be at the edge of the observable universe.
Given how the relevant "edge" here is the gap where this destruction matters, we can empirically vet this claim.
Welp, that solves it ig.