"Rolling back" Iran's air defense seems like very fuzzy phrasing. Certainly, Iran was not able to close its own airspace, nor prevent ongoing airstrikes on many American and Israeli targets. At the same time, my armchair observation is that a great many US and Israeli airstrikes were accomplished using stand-off weapons [1], which would not have been needed if the United States and Israel had achieved 'air supremacy'[2] as has been the case in America's conflicts in recent history.
The observed trend in USAF readiness has been downward for some time [3][4]. Air war is more than single sorties. If you have anything resembling an accurate summary of sorties flown, targets successfully hit, and number of combat-ready aircraft throughout the (currently on hold) war, and so on, please share. Absent such detailed information, all we have are various degrees of speculation.
1. https://news.meaww.com/us-used-tomahawks-himars-standoff-wea...
2. https://en.wikipedia.org/wiki/Air_supremacy
3. https://www.airandspaceforces.com/air-force-mission-capable-...
4. https://havokjournal.com/culture/military/the-hidden-erosion...