I included the extra omake chapters from the scans, also not sure why the official releases don’t have this…

They don't even put in the character intros, or the map, or the table of contents in the front of the book. To call these volume releases is a joke. They literally slapped the translated cover on the front of the chapters and released it like that.
If you don't mind reading individual chapters, the ALPHA manga torrent has individual chapters up to Chapter 127 which is well beyond vol 15.
https://nyaa.si/view/2058798
For everyone complaining about the lack of "bonus/extra content" in these volumes, that's because Alpha Manga (the English language brand of AlphaPolis, the original publisher of this LN and manga series) is a low-budget publisher with a focus on direct-to-web (and more recently direct-to-mobile-app) - no physical volumes, and a very small English catalog - they aren't gonna put tons of effort in like publishers who make collectible physical volumes do.
Also, it's up to Volume 24 for english - they are almost done (28 is final volume, just finished in Japan last year July 30th 2025). Looks like they are managing to churn out a whole volume every 2 months, since they only started translating this in 2023. Good pace, although their initial pace in 2023 was almost down to 1 volume per month.
I'm guessing this torrent probably won't get a refresh/update until the English volume releases are complete.
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