It would be nice if that when seeing a list of items - an "owned" tag is displayed.
When dealing with big libraries its hard to keep track of what you own and what you don't when seeing deals \ dlcs \ and other lists in general.
This would be a great QoL feature since the "owned" button already is part of GG but not really implemented visually in lists.
Steam is a good example
The blue icon is = In library ( also entire bar has dark overlay )
White icon is = Item wishlisted
Grey Overloay = ignored
No icon or Overlay = not owned or wishlisted