Forty four games have been played at Rugby World Cup (2019) (link). The official website for the tournament includes data about discipline in each game.
I have curated the discipline data. My observations are:
Cards (28 yellow cards, 8 red cards) (link)
Penalties and Free Kicks Conceded
Penalties and Free Kicks by Referee’s Country
Penalties and Free Kicks by Referee
Photo Credit
Jerome Garces (Grit Sports Live, Twitter)