So, I just completed the hidden artifact appearance quest line to get the “Improving on History” achievement. and when I looked for it in the artifact appearance wardrobe, it does not show up in there. Can this bug be fixed? if so, I would be very appreciated.
Try going to your class all with the artifact equipped and previewing the colors on the podium like you were choosing its appearance in Legion. This usually “activates” new colors for the transmogrifier later, from what I’ve found.
It worked, thanks for the advice.