Hi @Ancalagon,
Sorry to hear this. Sometimes it’s possible for DLC to become temporarily desynced with the backend - especially if you’ve returned from a break.
Can you please try restarting Vermintide 2 (possible a few times) and check if the DLC becomes available to you again?
If not, can you please provide me with your Xbox Gamertag so we can take a look at your account in the backend.
Please let me know how it goes!