I wouldn't get your hopes up too high. Once everyone's bored of this war and distracted, and the man on the street in the Arab world is once again existentially preoccupied, it's not unlikely Arab leaders will end their performative outrage and return to real politik, making money and throwing Palestinians under the bus.
Oh, don't worry, my hopes weren't that Arab leaders would hold Israel accountable. Only that some of us will remember this outrage.