There is no leaderboard for rta's, but ingame leaderboards for the time trial levels exist. Otherwhise you could compare your goldsplits, because we use an autosplitter it's 100% accurate.

And if you want to see all IL strats you can check the Plat% runs since they basically are all the ILs after each other in one run. So imo there is no real need for an IL leader board.