Molten Bronze Skin not cool with alchemist?

I was playing around with options and I saw molten bronze skin plate and half plate, and this artificer character wont allow it to equip.  Is there some requirement that wouldnt allow it to find it in the equipment search?  It is a Triton Alchemist, content is purchased and enabled, and I am unsure why this is the only character in my campaign that cant find this item.

Thanks in advance!

The Molten Bronze Skin is a Mythic Odysseys of Theros item which means it falls under the Magic: The Gathering content. If you haven't turned that on (Character Editor > Home section > Sources > Magic: The Gathering Content > On/Red/Right) then you won't be able to see it in the character.