If this were to happen, I would assume that Gauntlet players would want rewards. But then that backtracks the fact that we get like 1.1k per gold when we finish every single Gauntlet Game.
Unless this was purely based on fun, and no rewards. I wouldn't really see a massive points towards it, like, you can just make your own leaderboards in a private discord server and invite people towards that can't you?.
Not too mention as, how would they track people? Because Gauntlet games are starting to become an often thing, so would players have to create a ticket and submit the time? Or would they have to make a system (which also adds in more time for the devs) that account to a dedicated team each time a Gauntlet game would be played.
Overall, Gauntlet already has a leaderboard (
https://potterworldmc.com/game/revenant/), there wouldn't really be a massive reason to have one dedicated to times, so as said before, let the players do this on their own and seperately invite partcipants.