Xbox series x
Private server
Days of high adventure
Usa
Vestmenys of kurak do not show up in ancestral knowledge after learning them. I can search amd find them only. They do appear in work bench
I would’ve assumed they should be in with the armors, not ancestral knowledge. 
Ancestral knowledge stuff is strictly Battle Pass stuff i do believe, since you learn Kurak’s Vestments from the slab in the boss room it just goes to the Armorer bench menu just like any other recipes you learn from “Knowledge Slabs”
Those show up under armor lnowledge or escoteric and i didnt see this there either?
according to the wiki Kurak’s vestments knowledge is in the survival category and can only be crafted in the improved Armourer’s bench.
Yea n didnt see it there either