Iran has nuclear weapons, has had them for probably 20 years or so, maybe longer and both Israel and the US know this. The reason the US got into the fracas when Israel attacked Iran over the constant attacks from their proxies is because doing so warded off a nuclear exchange between the two. The deep penetration bombings by the US was against Iran’s bomb-making facilities as advertised and it may also have been to bury the bombs Iran already has. So those bombs are still there. It’s not just enriched uranium down there.
This is why Trump kept insisting that this is all about Iran not having nukes. They do have nukes but right now they’re likely buried under the collapsed mountain and the US, along with all the rest of the Middle East, wants them to stay there. The only reason the US would agree to such a poor deal with Iran would be if Iran agreed not to dig out those bombs or make more. Besides, Iran may have a few mounted on ICBMs, stashed away, which could be why the US stopped short of bombing their infrastructure, that could be the trigger that fires off those ICBMs and the same reason Trump kept yelling at Netanyahu to throttle back the war in Lebanon. To keep the Iranians from lighting the fuse.
Going for regime change in Iran isn’t something the US “may not have the stomach for” as Trump put it, the truth is that it would very likely set off those nuclear loaded rockets that the US obviously thinks may still be there. Certainly, they were threatened with the use of them in deadly terms because that’s what Iranians do. This is also why the insistence that the Iranian people must be the ones to overthrow their government, because it isn’t going to nuke itself to stay in power.
The fighting between them isn’t over, the proxies will still keep attacking Israel and so on but Israel has just about crushed Hamas and has a deep military foothold in Lebanon, while Iran’s been seriously damaged and will need those sequestered $billions to rebuild Iran more than to finance proxy attacks. Israel’s emerged as a regional major military power and now has the Saudis backing the US push for the other Middle East nations to join the Abraham Accords and live peaceably with Israel.
Certainly the rest of the M.E. wants no more of Iran’s aggressions, this short war has cost them all dearly and they’re unlikely to ever fully recover from the damage done to their oil and gas production, and that’s all Iran’s fault. With the old Ayatollah fanatic dead and the IRGC in charge instead, it’s possible that Iran may take a new and softer road.