This is one which avoids info-dumps... to it's detriment. We have absolutely no idea what the blazes is going on half the time, but it feels like the author and the characters do. It feels like dropping in the middle of a series with no introduction. There is an art-form to writing things like that, but this one isn't really cutting it for me, so hopefully things become clearer within a few chapters.
(...That aside, I too am dubious about the "isekai" tag. That's not usually used for fantasy settings where people are popping in and out out various different dimensions (notably, none of them earth so far). It seems not so much about "being transported to another world", as just a multi-dimensional setting.)