"Infinitely expanding and galaxy illuminations Ten of thousands of light years.. Hundreds of millions of light years.. Countless unknown aliens monsters live beyond stars where light cannot reach." (Daizenshuu 4)
This Daizenshuu scan refers to what we're calling the 'Observable Universe' here, it talks about an infinitely expanding light but with darkness that still dwells before it, and creatures that live there. This is the section where the Four Kaio govern their own associated cardinal direction holding countless galaxies.
(Daizenshuu 4)
"The infinitely expanding universe is determined mainly by the direction that each king manages, and the place managed by the king is supervised by the king of the world, and the gods of the north, south, east, and west manage the Universe. Ultimately, the Great King God is supposed to oversee the whole world."
What lies beyond, is the 'Unobservable Universe.' We call it Unobservable, because it's stated to be beyond the Stars and contain no light, and it is the same place where Yakon was stated to come from and reside in, and the place that they fought him in.
And we know that this place
HAS to be beyond the edge of the Observable Universe that we see in Super, since it's littered by stars and light. It's in the Unobservable Universe that lays beyond. There are no contradictions, everything is in line with the show.
Now, for the scans on the infinite nature of the entirety of the Living World:
"An infinite space of light and darkness where the unknown lives" (Daizenshuu 4)
"An endless space that envelops all celestial bodies that exist in this world." (Daizenshuu 7)
People read incomplete Daizenshuu pages at surface level, see that it refers to both a Universe that is infinitely expanding and outright infinite, and falsely conclude that it has inconsistencies. This is false. The same people do this and end up thinking that the DB Universe only has 4 galaxies.
Read all available information, and with the proper context provided you will understand how the DB cosmology works. It's a cosmology that contains both an infinitely expanding Universe, and an infinite Universe.
And it's backed up by the show itself, through Yakon and his home planet and the edge of the Observable Universe being lit with stars.