Trophy "Part 6: Old Blood, Older Oaths" does not unlock

Playing the game on PS5. "Part 6: Old Blood, Older Oaths" is a story-related trophy which is supposed to unlock automatically when you have decided to defend either Minrathous or Treviso against the dragons. However, the trophy was not unlocked after I have finished the quest. I supported Minrathous first and then repeated the quest but this time with Treviso. Unfortunately it still doesn't work.