6 chapters = 1 volume of the light novel, no wonder this feels very short and is lacking details.
Since the translated light novel is about 250+ pages per volume, I can somewhat imagine how much was thinned out/removed/replaced.
Kinda sad, especially for this story that doesn't have much of an initial base plot as the usual isekai stories but instead focuses on "realistic" world building & especially character development [ not sure how realistic the setting is,though, because my knowledge on ethnology and tribal structures/communities is very limited].
Still, the story is very interesting, it just takes too much time to read through so I can guess why this isn't so popular compared to other stories out there.