I'm seeing between 3 and 6 killed reported by the Independent, Al Jazeera, and others that I havent heard of before mostly citing Comittee to Protect Journalists. Mohammad Salhi is the only one that I can see is definitely confirmed.

https://www.independent.co.uk/news/world/middle-east/palestine-journalist-killed-israel-hamas-b2427021.html

https://www.aljazeera.com/news/2023/10/10/at-least-six-palestinian-journalists-killed-in-israeli-strikes-on-gaza

https://cpj.org/2023/10/journalist-casualties-in-the-israel-gaza-conflict/

https://www.wsj.com/livecoverage/israel-hamas-gaza-rockets-attack-palestinians/card/palestinian-journalist-killed-during-incursion-from-gaza-osZzWSiVD0aWiFNdaOya