It’s not the “mainstream” DC line, but audible’s Sandman adaptation is really good and they’re about to release part 2.

Audible also has a series of DC audiobooks, but I haven’t read them myself:

https://www.audible.com/series/DC-Icons-Audiobooks/B074564TZN

I was wondering this too. GraphicAudio lacks a lot of them here in Australia, if there were a screen reader that could read speech bubbles etc I would DEFINITELY use it, especially since a lot of early Marvel/DC aren't done by GA/Comicstorian since they lack an overarching storyline.

I am not sure how you feel about Podcasts. I am totally blind and I love them! Here is a link to the X-Men podcast. It is a fan made podcast that has some audio sound effects that sound pretty good.

https://castro.fm/podcast/4419f169-eccd-486f-904e-88ff2da8f9d3


And later on this year Spotify will be having a new Batman unburied podcast.

https://variety.com/2021/digital/news/hasan-minhaj-riddler-batman-unburied-podcast-1235064887/

As far as reading actual physical comic books I have tried to use apps like Seeing AI, or Supersense. With minimal success.
Marvel also has a few good scripted podcasts. This one is for marvels old man Star Lord podcast.
https://castro.fm/podcast/53e41fc3-b233-4b96-9e11-2813a0a310ed

And this one is for marvels wolverine. FYI this one is not very kid friendly!
https://castro.fm/podcast/6267ab8d-ce09-4fe4-971d-ceeab59d5aec
I hope some of this helps you.
Stay safe

I didn’t even know YouTube comic book readings were a thing, that’s awesome.