There are no World Cup games on July 8 because the tournament has entered a scheduled break after the group stage ended and before the knockout rounds resume. This pause allows teams time to rest and prepare for the next phase of the competition.
The break is a planned part of the tournament structure, providing players with recovery time and teams with opportunities to strategize for upcoming matches in the knockout stage.
Sources: https://www.idahostatesman.com/sports/article316421656.html