Radiopharmaceuticals are enriched to 60%. Iran is one of the top producers in the world. Iran has a natural abundance of radioactive isotopes- the background radiation of spots in Iran is extremely high: https://en.wikipedia.org/wiki/Ramsar,_Iran
Iran imports radiopharmaceuticals from Canada and that import was never restricted. Besides, radiopharmaceuticals are done with cyclotrons and do not require 60% HEU.
There are dozens of elements and isotopes used in radiopharmacology. Highly enriched uranium is absolutely one of them -hence why energy.gov is posting about it- and it's significantly cheaper than using a particle accelerator to create radioactive isotopes.
https://www.energy.gov/science/ip/articles/harnessing-power-...
https://www.presstv.ir/Detail/2024/04/08/723301/Iran-among-t...