Say more Jews survive the Holocaust/stronger foreign backing allows Israel to take over the whole West Bank in the 1948 war.
Well, for one, more Jews surviving the Holocaust would lead to a stronger Ashkenazi presence in Israel, with very significant implications for Israeli culture. I don't know enough to say where that'd go, but IIUC it'd probably mean less religious influence, which means more Muslim-favorable arrangements than otherwise.
But all the same - there would've been less precedent set, and more international recognition of Israel owning the West Bank. The whole Israeli-Arab mess would probably be more stable than iOTL. All that would mean more Jewish-favorable arrangements than otherwise.
And then to mess things up further, one of the few "facts on the ground" I know about this situation is that many religious Jews would refuse to go on the Temple Mount even if it were allowed, because they don't want to inadvertently step where the Holy Place of the Temple stood, since only the priests were allowed to go in there. (Much less the Holy of Holies, which only the High Priest was allowed to enter, and him only once a year.)