Would there be an XP 2 refit for GW ships I wouldn’t think so because by the end of the general war a lot of them were probably converted to X1 ships destroyed during the war or mothballed
SVC PREVIOUSLY SAID HARD NO TO THE IDEA OF X2 REFITS OF NON-X2 SHIPS.

By Kosta Michalopoulos (Kosmic) on Thursday, December 03, 2020 - 06:00 pm: Edit

Jay, it has been stated multiple times that X2 ships are new builds, not refits, and that there will be no "partial X2" refits of previous era ships.
SVC CONFIRMS THIS