Feyd-Rautha's coming of age and becoming an adult in the eyes of the Dune universe is vital for another reason. Building toward the climactic Dune 2 ending on Arrakis, Baron Vladimir Harkonnen ...
Baron Vladimir Harkonnen appoints Feyd-Rautha as the new governor, who leads the planet until Paul manages to completely take over. According to Denis Villeneuve’s Dune Part 2, yes, he did.