Taylor usually gave the red challenge flag to another staff member, which is now allowed following the NFL's rule change before the 2026 season.
https://www.foxnews.com/sports/zac-taylor-admits-breaking-nfl-challenge-flag-rule-8-years-league-makes-change
https://www.foxnews.com/sports/zac-taylor-admits-breaking-nfl-challenge-flag-rule-8-years-league-makes-change