Why was the sculpture of a bearded man found at Mohenjodaro named as 'Priest King' by the archaeologists?

Archaeologists were familiar with the Mesopotamian history and its “priest-kings” and have found parallels in the Indus region.

A stone statue of a bearded man known as the "priest-king" found in Mohenjodaro was labelled as such due to the parallels drawn from Mesopotamian history, but its connection to political power remains uncertain.