As we continue to work toward regulatory approval of the Microsoft deal, we’ve been getting some questions whether our upcoming and recently launched games will be available via Game Pass," says the statement. “While we do not have plans to put Modern Warfare III or Diablo IV into Game Pass this year, once the deal closes, we expect to start working with Xbox to bring our titles to more players around the world. And we anticipate that we would begin adding games into Game Pass sometime in the course of next year.”

https://www.ign.com/articles/activision-blizzard-shares-xbox-game-pass-plans-leaves-door-open-for-diablo-iv-on-game-pass-in-2024

Seems like they said it wouldn’t come to game pass in 2023. Are you referring to a different quote?