EDIT: Well, it might be awkward to have Palpatine just offer Kylo a vague “Final Order” “might” during the opening, and a subsequent reference to “outdated ships” or whatever wouldn’t make immediate sense. 😕
In the board meeting the FO officers are upset about of Kylo Ren’s decision of helping the Emperor, they don’t belive in Palpatine and his vague promisse, but Kylo even says that “what he saw in Exegol could turn the FO into a real Empire”, so he saw the destroyers there at some point, but we as audience did not, works like a build up to the reveal of what is the Final Order when Palps talks to Pryde and the destroyers emerges from the ice…