He's supposed to be in Japan with Axel right now but can't fly because he hasn't even taken a single jab and had only recently admitted it internally.

Hence he's inconveniencing so many staff members who had worked hard to coordinate for all the stuffs including the paperworks for his stay in Japan. This also ruined so many schedules, some are planned as long as 3 months in advance.

Why he hasn't stream? Because people will keep asking for the reason and he's afraid he'll have a slip of mouth and speaks the truth, he doesn't want to spark a vaccination debate among the Holo fanbase.