I don't think the political pressure Biden and his Cabinet will face can allow them the luxury of letting this happen. If another poll comes out like that NYT/Sienna one showing Trump ahead in all battleground state, they'll have to pressure this.
As for the Arab world, I think it's beyond obvious they won't do shyt. That Hezbollah dramatic and silly theatrics have shown these guys are all just attention-seeking. Making video teases and stuff when kids are being kiled was in poor taste.
Only Yemen the darker "Arabs", had the balls to declare war. Only Bolivia,Tchad(at the behest of UAE/France recalled their Ambassadors to Israel).
Biden is surrounded by Zionists who can't really find a country that's willing to occupy Gaza. So Israel will do it and its fascists will re-establish settlements in Gaza. Israel is too shook after October 7 to let Hamas reconstitute itself with 2 million furiously vengeful Palestinians after Israel has killed 0.5-1 per cent of Gaza's population in a month.
The Arab world is not shook. They're pragmatic. For decades, Israel has talked about the 'Samson Option'. If they ever felt existentially threatened, they would fire nuclear missiles at all of its perceived enemies in the Middle East and would destroy the region. Thank America for letting a rogue country like Israel acquire nuclear weapons.