You can check the status of all your Usage Rights requests in your Archive library. There are a few ways to do it:
Check individual assets: As soon as you request Usage Rights on an asset, that asset will display a tag with the up-to-date status of your request: either Usage Rights Pending, Usage Rights Approved, or Usage Rights Declined.
Use the Usage Rights filter: You can also apply filters at the top of your library to isolate the Usage Rights requests that are still pending, have been approved, or have been declined. If you want to see all the assets you’ve ever requested Usage Rights for at the same time, select all three filter options (Pending, Approved, and Declined).
Also, here's How to see all content without Usage Rights. This article will help you see all content that you have not reqeusted any usage rights yet.