is jujutsu kaisen episode 38 filler?

Mei Mei and Ui Ui fight the special grade Smallpox Deity summoned by Kenjaku. Mei Mei destroys it with Bird Strike — a single crow sacrifice that hits hard enough to one-shot a special grade.

Meanwhile, Nanami joins Maki and Naobito in confronting Dagon, whose Disaster Tides have evolved along with the cursed spirit's new fully-formed body.