The intelligence assessment was very careful about what it said.
>A U.S. intelligence assessment says Iran is not pursuing nuclear weapons at the moment but has ramped up activities that could help it develop them. https://apnews.com/article/us-iran-nuclear-intelligence-b506...
So they were not actively building a nuke, only getting all the pieces together to build one ready....
Prior to the deal: >Iran initially possessed centrifuges sufficient for one nuclear weapon, but not for nuclear power. https://web.archive.org/web/20190709050018/https://www.polit...
After the deal was broken by Trump and Biden was trying to restart it.... >2023 : An IAEA report on the Fordow Uranium Enrichment Plant found that two cascades of IR-6 centrifuges were configured in a way "substantially different" from what Iran had previously declared. Iran claimed the difference was due to a human error.
>On 4 March(2023), Grossi met with Raisi and other top Iranian officials. Earlier, IAEA had detected uranium particles enriched up to 83.7% at Fordow. In the meantime, Iran gave assurances that it would reinstall monitoring equipment at sensitive locations.