is one piece episode 843 filler?

From the Tamatebako explosion, the Whole Cake Chateau collapses, sending Big Mom, Galette, Morgans and Stussy falling towards the ground. Galette is saved by Katakuri, Morgans falls to the ground and Stussy gets away using Geppo.

Carrying Luffy, Sanji gets away and enters safety in Bege's castle. Caesar carries them all away and Germa 66 also retreats, but their castle in Germa Kingdom is attacked by the Big Mom Pirates.

Meanwhile, Streusen uses his Devil Fruit ability to cut the Whole Cake Chateau and turn it into sponge cake.