Replying to https://twitter.com/Treyarch/status/1329884752459960321:

@Treyarch @CallofDuty Happy to see an update, but still can't play splitscreen in Zombies on Xbox One X, private or public. Player 2 still has no HUD or map in splitscreen multiplayer and it still crashes halfway through those matches anyway. HUD and writing are also WAY too small in splitscreen. #CoD