It's not a coincidence at all if general relativity has a symmetrically reversed effect on spacetime for antimatter (time-compression-based cosmic inflation, no baryogenesis problem) and galaxies are the small bits of matter inside clumps of neutrinos surrounded by anti-neutrinos. Sounds crazy, but next to dark energy (and dark matter...extra curvature increasing toward the outside)... At least it has some elegance.
My bet is on the James Webb telescope observing distant galaxies that are too old to make sense without significant spacetime separation being an illusion based on the above hypothesis. We'll see. More localized effects like inverse lensing between galaxies and asymptotic pursuit of matter by antimatter are probably harder to observe.