Iran, like every nation, has some descent folks, suffering, dying, needing a therapeutic. On the one hand, I say sell them leronlimab, because the results may compel us and other nations to demand it. A mild hesitation is that we can't trust Iran's statements about anything.
As LL save lives in Iran, curing folks of the virus, they may say it's doing nothing, so nobody else will buy it, and they can continue to buy it for their Sheiks and general population.
Conclusion: I say sell them some.