It's not meant to embody any particular culture but it's hard to come up with cultural dress completely from scratch. I think beautiful aspects of lots of cultures being appreciated as beautiful is quite nice
Well, it's definitely better than most straight manhwas that depict people of color as barbaric. This doesn't feel racist to me, but it is a bit stereotypical. It seems like the author took inspiration from different cultures and blended them together, though some aspects feel more like stereotypes than a deep understanding of those cultures.
For sure I think there's definitely a lot of racism in manwhas and mangas because there's unfortunately a lot of racism and ignorance in Japan and Korea but I don't think bwat was looking for a specific culture because it isn't a specific country they're trying to embody, just taking shallow inspiration from lots of different cultures which I don't really see as an issue. There's no harm in it and the intention is just from finding beauty in the culture of those countries and wanting to come up with something similar but not the same for a fantasy
I know it's fiction, but the culture portrayed feels like a blend of Turkish, Arabic, and Indian cultures, which are very distinct from one another. It can be a bit jarring when a story combines different cultural elements without enough explanation or a clear reason within the world-building.