Sort of. The Pope is the head of state of the Holy See as well as the head of the Catholic Church. He technically has absolute power to operate the Church as he sees fit, but because the Church is a gargantuan organization with a fuckload of tetchy old men governing its branches he has to play nice or risk schisms or political opposition. He can decide to create a new diocese for instance, but if he’s pissed off the people actually doing that work, it won’t get done. Popes also occasionally make divine proclamations, but it’s typically about christian canon and not church operations.