The quest version of this avatar is blanked out, what do I do to access it?
The very left column with the eye icon is for hiding and showing items.
its already shown but it wont appear
When the name of a hierarchy item is greyed out like that, it’s to tell you that the item is hidden.
The avatars are located in the same space, so I think you should hide the other one, observe it disappearing then unhide the quest version.