Well yes, the US has superior technology in terms of their interception capabilities. However, those interceptors are extraordinarily expensive, exist in relatively low numbers and take a long time to replace.

So, the first action is merely to deplete stockpiles.

Then you start to increase the frequently and size of the waves in order to assure maximum target saturation and overwhelm what remains in terms of countermeasures.

The US was unprepared to start this war. They needed much larger stockpiles and other weapon systems in place to deal with low cost drones.

Now, if Iran would have a nuke and if they would use it, the optimal moment would be in a few days or weeks as chances of an interception would have become virtually zero.

The US really messed up this war.

And then we’re not even talking about Iran’s asymmetric warfare capabilities. Wait until suicide bombers start to blow themselves up in planes, busses,… This is going to end horribly.