I saw the users who ran the game, but there was not a single run. How can I submit a game without running?

Which game?

and for the second question, you can't.

You need to submit a time, sometimes what happens is a game is submitted and then when setting up the leaderboard they don't add their run

Now I understand everything.

@dkm now you've said that I understand what he meant lol

Also, series mods can add games to the series without running them. That is another reason.