it's offered in polymarket.
https://www.ainvest.com/news/betting-odds-strike-iran-surge-32-67-polymarket-2506/But my personal take. I think this kind of possibility shouldn’t be something people can bet on. It should be illegal to offer wagers like this. I don’t see it in regulated sportsbooks, so I guess they’re complying with the rules.
But since Polymarket isn’t regulated, they can offer it. Still, I think it’s unethical. We shouldn’t be hoping for a war to happen, so betting on it just shouldn’t exist.
Polymarket is notorious for hosting some weird events of which the war was one of their favorite which they will never miss for anything in the world. On the ethics of such practice, I don't think I know what should be done about it but the truth remain that do it purely as business and not that they approve of it. I think that if their action is seen as a threat in any form, they would have been shutdown a long time ago. You should just see it from the business perspective and not on the basis of ethics.
I would be going to an extreme to close down polymarket because they dared to offer a market for people to bet on a conflict which could be serious enough to spark a worldwide war, though. It would be enough if they deleted the market, refunded the money to all bettor and issued an apology to their users and the betting community for being insensitive about the human damage and irreparable consequences there would be if the conflict between Iran and the United States escalated to a new level. This is not about censorship, in my opinion, it is about having a minimum of human decency and being aware there could be people suffering behind our bets. This is definitely not the same that betting on a football match or a fight between two professional boxers.