Iran and Iranian-backed militias fired missiles at Israel and Arab states, apparently hitting the U.S. Embassy compound in Kuwait, while Israel and the United States pounded targets in Iran as the war expanded Monday with statements of defiance and increasing casualties.
They are already recognizing Israel and collaborate with each others
Saudi Arabia, Kuwait, Qatar and Iraq have all been attacked by Iran and do not officially recognize Israel. That has some real consequences. For example you can not travel to Saudi Arabia with an Israeli passport.
They unofficial recognize it so still legitimate targets. Those country was willing to normalize relation with Israel isolating Palestinians even more
https://www.newarab.com/news/israeli-company-agrees-venture-saudi-counterpart
https://www.ibanet.org/article/d2659617-4cab-4fe9-8b60-a971485ec3d6
https://www.timesofisrael.com/dozens-of-israeli-business-and-tech-figures-visit-saudi-arabia-report/
https://www.jpost.com/middle-east/article-856495