How do you know "they always come back with nothing"? Department of state does not make those results available.
You seem surprised that this is happening. The US does not have diplomatic relations with Iran, so it is completely expected.
WOM cannot waive or expedite background checks. Seems like perhaps you received faulty legal advice. It can compel a decision, but if the extensive security process done for Iranians is not complete, that decision defaults to a denial.