1, the main story hasn't arrived yet, and the two large dlc of Wizard 3 won't be opened until the main story of your game ontology comes to an end. When the story of Wizard 3 is over, you will automatically receive the story of these two dlc to start the task.
2. In order to avoid the chaos of the plot, these two dlc can't be opened in the early stage of the plot, and the tasks in these two dlc are relatively difficult and the monster level is relatively high.