I love that you've added so much around the consoles. However I would like to propose an option to show "Owned" across any platforms.
For example, I might own a game on Switch, but forgot about it. I have a few in my wishlist that I own the Switch, but wishlisted it for PC. I'd love to mark that I own this item on the Switch tab, but than have it show either across all tabs (maybe in some special design to designate its Owned on another platform), or maybe some new area that goes across all platforms.
Along with that would be great if I add something to one platform, and I wishlisted it on another platform, that it prompts asking if I want to toggle the wishlist off.