Iran has been preparing for this for decades. I wouldn't be surprised if they held a hidden reserve for air defense and let the USAF 'get comfortable' before redeploying
There was a ("propaganda") video by the Iran Forces some weeks ago showing some underground facilites: If even half of it is true shown there, then they have large capacities.
Even if they don't, US war planners now have to factor the possibility of hidden AA defenses in their risk calculus moving forward. So no matter what, a win for Iran to some degree