What geopolitical concerns can Iran have over Israel, that Egypt, Jordan or Saudi Arabia wouldn't have? They're all functionally Israeli allies now.
It is important to understand how we got here, to understand what might be plausibly achievable.
In the 1920s after Britain kicked out Turkey there was a partition proposal. The Jewish leadership at the time agreed saying they would accept a land "the size of a tablecloth". The Palestinian leaders refused absolutely and demanded the expulsion of all Jews. Their leader declared "It is impossible to live alongside the Jews" and threatened "A river of blood".
In 1937 there was another proposal in which 'Israel' would have been the small region from Tel Aviv north to the Lebanese border. The Palestinians rejected it out of hand.
In 1948 the Palestinians were granted considerably more land than they have now for their own independent state, but refused partition as unacceptable. Five Arab nations attacked Israel with the intention to destroy it completely. The General Secretary of the Arab League at the time Abdul Rahman Hassan Azzam, who personally orchestrated the attack declared the intention of the war was "An extermination and a momentous massacre".
Jordan and Egypt annexed the West bank and Gaza for the next 2 decades during which the Palestinians had no political rights or freedoms. The Palestinian leaders never pushed for the formation of an independent state during this time, and Israel took both regions during the Six Day War.
So if we include the Oslo accords, the Palestinians have been offered an independent state of their own four times, and every time they have rejected it completely as unacceptable. "From the river to the sea, Palestine will be free" literally means free of Jews. Over and over, the Palestinian leadership have made that crystal clear. An independent state of their own alongside Israel in any shape or form, in their own statements and openly declared intentions has persistently been rejected.
Meanwhile Egypt and Jordan have realised that Israel is no threat to them, in fact both states have suffered coup attempts by Palestinians. They are now functionally Israeli allies against the Palestinians. Saudi Arabia has now pretty solidly moved in the same direction.