There’s no clear statement from Mihoyo about this matter, but there was some speculations about it:
- Xbox isn’t doing too great in Asia
This is probably their biggest reason on why the game skips the Xbox, since the console itself isn’t selling that great in Asia.
- Microsoft didn’t approached the devs
Another reason on why the game skips Xbox is due to MS didn’t approached Mihoyo for it. This was different with Sony, where they approached Mihoyo, and show their support since the game was first announced in 2019.