is one piece episode 793 filler?

Behind the Whole Cake Chateau on Whole Cake Island is Lake Aprico, an inlet from the sea which Big Mom's allies can dock in. There, several Germa 66 ships come in and connect with each other, forming the Germa Kingdom, the world's only seafaring kingdom whose territory is solely comprised of these ships.

The kingdom is mostly populated by men and soldiers, who constantly train every chance they get, and Sanji sees many of the soldiers training as he looks on sullenly from the balcony of the main castle.