With the clock ticking, the US and its allies are confident that after some tough negotiating, a deal between Israel and Hamas can be reached. A guaranteed end to the war will ensure increased humanitarian aid to the besieged enclave, the release of Israeli hostages, and create a better "day after" in Gaza without Hamas in power. The US will continue to work toward closing the gaps and ensuring that peace and stability can be restored to the region.
There's no question that Israeli forces must be stationed along the Philadelphi Corridor to prevent Hamas from rearming. Indeed, Netanyahu made clear to Blinken that Israel's security is paramount and that a withdrawal from these areas would pave the way for more terror. Israel is willing to be flexible, but it's not willing to compromise its principles or its duty to protect its citizens.
There's no indication that a cease-fire is on the horizon. Netanyahu has consistently sought to escalate the situation and prolong his political career, thus why he added new conditions that he knows Hamas will never accept. Earlier proposals didn't mention an Israeli presence along the Philadelphi or Netzarim Corridors, but the US is now supporting these additional demands. While Palestinians face genocide, the US is only interested in supporting Israel's maximalist agenda.