He just wasn't a center piece.
But m8, he was there for a big chunk of major points.
First one to meet Hyori, had his own solo plot during first half of Wano.
Got a new toy that belonged to one of the most hard wanked characters in the series, despite being trash.
Had a "Supernova" big participation during Roof Piece.
Got compared to lots of samurais, including the most famous of them, Ryuma.
Got a major feat by being the second character in the story to be able to permanently scar Kaido.
Got CoC.
Shitted on Killer.
Shitted on Apoo.
But geez, guess Zoro wasn't that important at all.
wah wah wah....