We have been able to filter the past years’ online challenges to see the finalists and winners. Unless I am missing something obvious, it seems that you are no longer able to do that. I always have found it useful for my students to see what other teams had done that the judges liked and hoped to be able to use that resource again.
This may be a useful resource for you then. I keep this page on the unofficial VEX wiki updated each year with all of the winners for each online challenge. https://www.vexwiki.org/robotics_competitions/vex_robotics_competition/recf_online_challenges
Thank you @AidenPyle, that is exactly what I was looking for (though you made it a bit too easy on my students, I wanted them to do some work for it )