There's also the pressing question of whether Trump's massive airstrikes from B-2 bombers actually truly destroyed the facilities and these stockpiles. 

The Iranians aren't dumb, and likely took drastic steps to further protect, conceal, or likely move these enriched stockpiles - some 400kg according to most reports - as wave after wave of Israeli warplanes hit Iran, significantly before the US sent its bombers this past weekend. It appears core components are still intact - though Iran has long maintained it is merely for peaceful nuclear energy development. 

The NY Times is currently reporting that the US operation merely set Iran's nuclear program back by a few months. And further:

US BOMBS DIDN'T COLLAPSE UNDERGROUND IRANIAN NUKE BUILDINGS: NYT

Early emerging intelligence also points to the stockpile having not been destroyed, which contradicts the current 'victory lap' claims being made by President Trump and some of his top officials. In a huge development below is fresh CNN reporting based on a leaked assessment by the Defense Intelligence Agency (DIA):

The assessment, which has not been previously reported, was produced by the Defense Intelligence Agency, the Pentagon's intelligence arm. It is based on a battle damage assessment conducted by US Central Command in the aftermath of the US strikes, one of the sources said.

The analysis of the damage to the sites and the impact of the strikes on Iran's nuclear ambitions is ongoing, and could change as more intelligence becomes available. But the early findings are at odds with President Donald Trump's repeated claims that the strikes "completely and totally obliterated" Iran's nuclear enrichment facilities. Secretary of Defense Pete Hegseth also said on Sunday that Iran's nuclear ambitions "have been obliterated."