Q:
Holographic Shattered Dragon Wing Cover
Unfortunately, I think from what I’ve seen from similar posts, If it’s gone it’s gone. I’ve seen other threads like yours and they didn’t have any luck getting the wings back. As I understand it, acquisition was through completing the meta and support does not have the tools to give it to you.
Referring to gem store items but also relevant to this. Source
Please note that skins or partials skins that you previously purchased but which you no longer possess will not be unlocked on your account. The Guild Wars 2 Support Team cannot unlock skins that fall into this category.