One assumes, again, that the 'fund' will be investment funds rather than a direct transfer equal to Iran's nominal GDP, but that's still an enormous amount of investment that Iran can use to modernize its oil infrastructure to generate revenue which is gonna get used to fund its proxies.
"Online Rent-a-Sage" Bret Devereaux
Q: “ The Iranians are saying that they're gonna have access to a $300 billion reconstruction fund. True or false?”
Vance: “That's the sort of thing they could have access to, funded by the Gulf Coast Coalition, so long as they honor their end of the obligation.”