Being a HoYoverse game means being compared to, and often theorized to be part of, the other games in the developer's library. That's not different from Zenless Zone Zero – from day one after its reveal, interested parties have been dissecting footage and designs to try to glean insights into where the game is situated in the larger universe of HoYo titles. That being said, there really hasn't been much to go on. With only a handful of trailers/reveals and barely any story to parse through, much of Zenless Zone Zero's New Eridu remains mysterious.
https://screenrant.com/zenless-zone-zero-crossovers-genshin-honkai-possibilities/