I suspect sanctions and international finance laws are a bit more complex than that. It could be that a US legal entity that is fronting for a sanctioned count

I suspect sanctions and international finance laws are a bit more complex than that. It could be that a US legal entity that is fronting for a sanctioned country can indeed be blocked from receiving money, but you'd have to get a quorum of international finance lawyers to hammer out an agreement on that to have any chance of drawing a conclussion...