EDIT by @4ian in 2022: you can now add Leaderboards to your game using built-in leaderboards provided by GDevelop and Liluo.io. Read more here: Leaderboards [GDevelop wiki]
Those who play my game get a score. How can I show this score as a leaderboard? every person playing the game will be able to see other people’s scores and there will be a ranking
There’s this: [Leaderboards][WOW Scores] - Add leaderboards to your games
This: [Submit your game] Publish your HTML5 games online
And you can also do it with Firebase, I believe.
How can I do it using firebase? do you know?
I haven’t done it, but I guess you would use the Realtime Database functions.
http://wiki.compilgames.net/doku.php/gdevelop5/all-features/firebase/realtime_database#realtime_database