I’ve got the research, but the Anu helmets don’t appear in my equipment list. Which sucks, because they look awesome.
if you have the researsh they should apear as craftable, make sure your fabrication windows is put to all class (on the left) and the armor section is selected (on top of the list of crafftable thingies).
If you talking about the Priest helmet that’s a mutation not equipment. So you need mutation lab and it “Required” a priest in the mutation menu to see the extra 3 helm. Other classes will only shows 3 basic helm Dazz/ acid/ accuracy mutation.