So answer the question why did Iran have over 400 kilos of 60% enriched U-235 when only 3-5% is needed for power generation. I don't ever remember Fox saying 60% was weapons grade U 235 do you have a link?
Enriching uranium from 60% to 90% U-235, while technically feasible, is a relatively quick process compared to enriching from natural uranium to reactor-grade levels (around 3-5%). The exact time depends on the number and type of centrifuges used. Based on the capabilities of Iran's centrifuges, it's estimated that it could take a month or two to enrich enough uranium for a single nuclear weapon, starting from 60%.
As of September 2022, Iran had a total of 9,892 centrifuges installed at its enrichment facilities. This includes 2,782 advanced centrifuges of various types and 7,110 IR-1 centrifuges. The advanced centrifuges are primarily IR-2m, IR-4, and IR-6 models. These centrifuges are located at the Natanz and Fordow enrichment facilities.