Purchasing Amorphous Velazul's armor from the raid merchant in The Overthere, the armor has a required level of 70 and a required level of 60 to click for the attunement. Upon attuning on a lvl 94 the reward window pops up and only allows you to select the non useable item as reward.
Are you right clicking or clicking the pink link? If you are clicking the pink link that is the reward preview window. Even if it lets you click it, the armor isn't usable til 105, there's probably a minimum level to show the reward option which you will see 2 options to choose from when you are 105.
It sounds like the same bug that was fixed here for the group versions of EoK armor: https://forums.daybreakgames.com/eq/index.php?threads/vaniki-eok-armor.295070/
Which probably makes sense. However the group gear shows 95 to attune whereas that raid piece shows 60. So something is squirrely. I'll post back once I level up and confirm if 95 is the goal.