So, Im currently on an completely unmodded server. My DLC is NOT showing up in game. (Im mas level and I have opened the prereqs). Steam says it is in my library. I beg to differ lol. How do I force content to reinstall itself, please and thank you.
I understand your pain 
. Currently have issues of not only DLC not showing up in work benches but for instance nothing but armor padding showing in armors bench when I could use it a few weeks ago with no problem. I am on private Siptah server using PS5 its crazy when others can and own the server. I can admin in stuff but want to make legit
Unmodded as in Official?
What are you trying to make?
Have you checked to see if All is selected in inventories for benches and player character?
If you’re trying to make armor or weapons, are you using the improved version of each bench?