tl;dr the source material is great and it came before Isekai Shokudou's, but the anime adaptation is kinda bad
First of all, this is not a copy of A Restaurant to Another World(Isekai Shokudou). The source material for Isekai Izakaya Nobu, the novel, came before Isekai Shokudou's novel.
As for the setting, while it might contain isekai in the name, there's no fantasy elements. Izakaya Nobu, a