The finalists were displayed last year with the ?filter=finalists construction:
https://www.vexforum.com/t/online-challenges-finalists/57100
https://challenges.robotevents.com/challenge/94/entry?filter=finalists
It appears that something might be broken, though, as it appears to just change the title on the list of entries at the moment. @tweber @DanMantz
edit: appears to be working now. That was quite a speedy fix.