Iran has multiple enrichment sites, with a reported 83.7% pure U-235. Such purity is only needed for one thing, and it isn't nuclear power plants which typically only need 3%-5% U-235.

Every credible comment I've read says they're in the process of developing them, the only group who says otherwise is Iran themselves.

From all available intelligence, no. They clearly have a nuclear weapons program (which are insanely huge to begin with) but there has never been a measured test, and no evidence of enriched uranium at a high enough purity to be weaponized.

It's insanely hard work to created weaponized enriched uranium. With the sanctions Iran has had for decades it would be next to impossible for them to get all the stuff they need to create it on their own.