I’m glad you mentioned that. As far as I know, the information about the Bazaar entitlements* can be accessed through Funcom Live Services API, and I think that’s how your game client is aware of what you have. However, I haven’t seen any in-game user interface for accessing that, and I’m not sure if it contains purchase timestamps.
I’ll look into this and maybe add it to BUGLE roadmap 
* I don’t mean anything negative by this. It’s a widely-used industry term meaning “stuff you’re allowed to use because you bought it”, so I hope that anyone reading didn’t get their feathers ruffled. 