Thanks for the additional information @ShannonS662 ! You're correct that the Reporting page will only show campaigns in Sent status. It looks like we had an issue with the process of getting all/newer campaigns indexed to be searched. We're working out some of the issues and will keep this thread updated with any news - sorry for the troubles!
It might be worth mentioning that the "Filters emails by send date" on the Campaigns page, and the search on the Reporting page isn't impacted by this issue. So that could potentially help out in finding any sent campaigns.