I’m skeptical. This incident wasn’t even in the US and it made American national news.

https://www.usatoday.com/story/news/world/2023/10/13/france-school-knife-attack-stabbing-killed-wounded-terrorism/71166435007/

Teacher dead and 2 wounded in knife attack at France school, terrorism suspected

https://abcnews.go.com/International/wireStory/french-intelligence-police-vetted-suspected-attacker-day-knife-103955753

French intelligence says police vetted a suspected attacker the day before knife killing at school.

https://amp.cnn.com/cnn/2023/10/13/europe/arras-france-school-knife-attack-intl/index.html

Teacher killed and several people wounded in France school knife attack

https://www.foxnews.com/world/knife-wielding-attacker-shouts-allahu-akbar-kills-teacher-french-school-amid-hamas-israel-war-report

Knife-wielding attacker shouts ‘Allahu akbar’ and kills teacher in French school amid Hamas-Israel war: report

20-year-old Chechen man on France’s terror watchlist arrested

Generally-speaking, whether it’s a good policy or not – some people have proposed not covering terrorism, to reduce its efficacy in creating terror – terrorism tends to be heavily-covered in the media.