Individual level leaderboards will be added to Trackmania Exchange asap. On that site you will be able to upload the replay file from your runs as validation. You can also download everyone elses replay. Right now we are waiting for the option to upload replays to go live on the site.
Trackmania Exchange (TMX) has been used as the main leaderboard for all PC Trackmania games since 2004 (except Turbo). With how easily replays can be saved and shared, TMX is by far the best solution to individual level leaderboards for this game.
For TMX, you would need the replay (once the option to upload a replay goes live). If you didn't save a replay, you can still find the replay of your best time on any map in the autosave folder.
Right now you can view the top 10 on each track here: https://opentrackmania.com/seasons And here is a tutorial on how to download the replay from that site: https://www.reddit.com/r/TrackMania/comments/i51q98/download_and_view_wr_ghosts_in_replay_editor/
Replay upload + leaderboards are now live on TMX: https://trackmania.exchange/mapsearch2?mode=1&authorid=21&limit=100&priord=0
Trackmania.io has leaderboards of all runs driven on every map: https://trackmania.io/#/campaigns
Spring 2021 - 01: https://trackmania.io/#/campaigns/leaderboard/3399c5d2-5baf-45c6-9977-1bd2da745c32/h_1dfEJJ8m7eY0jB6Ka7XWof6w
I released a tutorial that covers all you need to know to do speedruns on Trackmania 2020.
If you find it informative, I would love if you could like the video, leave the comment and share it to your friends interested in speedrunning the game !