Viral claims suggesting that U.S. forces have destroyed Iran’s “last long-range ballistic missile launcher convoy fleeing Tehran” are not supported by verified reporting and appear highly exaggerated.

What credible sources actually say
Recent intelligence assessments and reporting indicate that:

Only about one-third of Iran’s missile arsenal has been confirmed destroyed
A significant portion remains intact or hidden, including in underground facilities
Iran still retains roughly 30% or more of its launch capability
In other words, Iran’s missile force has been damaged—but far from eliminated.

About missile launchers
Strikes on mobile launchers are ongoing:

U.S. and Israeli forces are actively hunting launcher units as they move or prepare to fire
Many launchers have been destroyed in targeted strikes over recent weeks
However, Iran uses mobile trucks and underground “missile cities” to preserve capability
This makes it extremely unlikely that any single convoy would represent the “last” remaining launchers.