is jujutsu kaisen episode 7 filler?

Jogo, a volcanic cursed spirit, ambushes Gojo to test the strongest sorcerer's limits. The test fails spectacularly.

Gojo demonstrates Infinity, explains how Limitless works, and casually overpowers everything Jogo throws at him — including Coffin of the Iron Mountain, Jogo's domain expansion. Gojo counters with Unlimited Void, which crushes Jogo's domain instantly and leaves the special grade spirit paralyzed.

The encounter establishes the central fact of jujutsu's power structure: Satoru Gojo exists on a different level than everything else.