Good news, I found the problems, So it doesn't appear in the missions, But you need to give Ruben water, water that Roushk's wife gives you (I don't remember what the water or the wife is called lol) after that you will have to go to alden, who is in the training area in the same place, in Nortcrest, And you will have to complete his mission, which is to establish trade relations with bareshade (you just have to talk to 3 characters that in the same mission he tells you and then with Tienen, you should have no problems) and thus the option will finally be enabled)
https://lustfuldesires.miraheze.org/wiki/Black_Wolf#tabber-tabpanel-Complete-0
In the part of another blacksmith, it is better explained.