Hello to all! Do you someone know if players get experience in tournaments?

Nope, they receive 2XP for playing at least 15 minutes in league matches and a bit more for European competitions.

Thank you

Check the players section on the documentation at https://kickoffboss.com/documentation.php

Every official match played will give experience to a player that played at least 15 minutes. The experience gained varies depending on what type of competition. National League +2xp, Playoffs/National Cup +3xp and Champions League/Continental Cup +5xp.