This has come up in earlier thread which I will try to find for you but right now the search is not being very effective form. The basic summary is that this cruise has been unable to be booked for several weeks now and is in “Code Red”. I have asked several members of the future cruise staff what that means and no one has been able to tell me other than they know that it can’t be booked. Other Cruises are simply listed as sold out but this one is listed as “Code Red”.
Other posters here have noted, as you did, that the ship does not appear on any port schedules. Various posters have proposed that this is because the port schedules, themselves, have not been updated. Maybe so.
But I am very suspicious that this cruise will not happen, and have booked a back up for the following year, with a refundable deposit, as my plan B.
I have not been able to find anyone who can tell us any more information at this time, nor has my travel agent.