There are regular interal trading tournaments that are free to join.
Read more about internal tournaments: https://tournament.gunthy.org/
Make sure to give your bot a unique user name, this will only appear on the tournament leader board.
If you run multiple bot instances and want all of them to participate in a tournament, number your instance nicknames like this: TraderNickname_1, TraderNickname_2, TraderNickname_3. They will automatically get aggregated to a single leaderboard entry at the end of the tournament.
You can force submitting trading results to the tournament board by opening the PNL page, then select a single pair (not the "all" option) and wait a minute.