WASHINGTON — The Trump administration’s public portrayal of a shattered Iranian military is sharply at odds with what U.S. intelligence agencies are telling policymakers behind closed doors, according to classified assessments from early this month that show Iran has regained access to most of its missile sites, launchers and underground facilities. Most alarming to some senior officials is evidence that Iran has restored operational access to 30 of the 33 missile sites it maintains along the Strait of Hormuz, which could threaten U.S. warships and oil tankers transiting the narrow waterway. Related People with knowledge of the assessments said they show — to varying degrees, depending on the level of damage incurred at the different sites — that the Iranians can use mobile launchers that are inside the sites to move missiles to other locations. In some cases they can launch missiles directly from launchpads that are part of the facilities.…