As far as whether the psalm 83 war happened already I believe it was foreshadowed by the events you speak of but the psalm 83 war doesn't appear to be just any war and it isn't concluded by normal means God himself intervenes and the world knows it was the God of jacob who ended it. Now the abraham accords where also a foreshadow as bible prophecy often does it is the foreshadow of the covenant made with many.
This is usually how bible prophecy works it has many events that appear similar but are merely foreshadows of what is to come now I could be wrong and perhaps that psalm 83 war did happen but war is on the horizon and it is one of biblical significance