I would like to say that Hoyo-Mix just helps to create music for ZZZ, but they are not the main ones. Hoyo has created a separate music brand called San-Z Studio (btw they even added an office to the game, it is located on Lumina Square). Director and main composer of which is DMyoung (he create most of the music for Zenless). He used to be a third-party composer earlier. But now he heads the new Hoyo music brand, which they created specifically for this game.
Old School Disney Channel vibes fr. XD (in the best way) Fun fact, "this shark's got a bite" could be translated to "this shark's got a part-time job" since "bite" would be pronounced "baito" in japanese, and "baito" is short way of saying "arubaito" which means part-time job. XD