Looks like The White House is just winging it, and there’s no plan whatsoever:
A recent internal assessment from the Defense Intelligence Agency that was circulating inside the Pentagon in recent weeks determined that Iran could potentially keep the passage shut for anywhere from one to six months, four sources familiar with the document told CNN. But White House and Pentagon officials insisted that the assessment — particularly the longer end timeframe, which some consider a worst-case scenario — was not being seriously considered.
I would like to add that Russia transitioned to drone warfare after partnership with Iran. At first they were at disadvantage against Ukraine in this regard, but now this disadvantage is gone.
True but that was just advancing warfare technology, not a change of the overall plan.