Once you've completed 10 levels, the leaderboard will be displayed in the game.
You can find it by tapping the task icon in the home screen.
Then tap 'Leaderboard'.
Both Global and Country leaderboards only shows the top 200 players.
Are you wondering how to obtain the trophy? Those trophies can be acquired through a leaderboard event called 'SpeedFest,' which becomes available to join once you have completed all the match-3 levels.