

I think Biden allowed genocide to proceed apace in Gaza. Full stop. This is just an attempt to answer your question about what would have been better under Kamala, presuming she would have been Biden 2.0:
Biden heavily pressured Netanyahu to open to border with Egypt to let aid in, even temporarily withholding military support to get him to do it. Additionally, Biden made an effort, however ineffectual, to airdrop aid and build a temporary dock to bring in aid on ships. Biden rolled over for Netanyahu, but there was at least the semblance that he was bothered by the civilian toll and attempted to lessen civilian suffering.
I got the circumstances wrong, the temporary halt was because he didn’t want the weapons used on civilians in Rafah.
https://www.pbs.org/newshour/politics/watch-pentagon-holds-briefing-after-biden-announces-plan-to-withhold-weapons-delivery-to-israel
And also it caused a Republican shit storm: https://mccormick.house.gov/media/in-the-news/daily-caller-exclusive-more-100-lawmakers-slam-biden-withholding-weapons-israel
Looks like they did threaten to withhold military aid in the fall over the flow of humanitarian aid, but that didn’t happen.