Anthony Rapp just confirmed the Netflix launch date is the 19th. I do wonder why the lack of promotion, perhaps the impending launch of Paramount+ globally has soured things somewhat?
It seems to me that in general there's been a lot less focus on promotion for Discovery this season? Perhaps they figure the show has the fans it has, and won't really expand beyond this.
Honestly given how the Netflix algorithm works, I'm always notified as soon as a new season of my show is available the next time I go to the site. I'm not sure they need to do more than that.