This page details where to find all weapons and armor in Eitri, Svartalfheim, part of the Dawn of Ragnarok DLC in AC Valhalla. There is only one wealth item which provides an armor piece in Eitri - the Fire Giant Cloak.
Fire Giant Cloak - Jarn Herad
The Fire Giant Cloak can be found in a building at Jarn Herad, in eastern Eitri. You’ll need the Power of Muspelheim to access the cloak safely, since you’ll be forced to stand in some lava for an extended period as you pull a large boulder towards a ladder. You can do this without the power if you prefer, but you’ll need to use some rations to keep your health up as you move through the lava. Once the boulder has been pulled back fully, you can jump onto it and then climb the ladder to reach the wealth chest above.