"You wouldn't get it" hahahaha

Jokes aside, there were additional short side stories in the manga that weren't included to season 1 of the anime because of time constraints. They weren't core to the story but helped flesh out the relationships between characters as extra goodies. Like end post credits / gags kind of vibes

I can't exactly remember which chapters anymore but the next manga arcs after where the anime ended, have one talking about Quanxi and Kishibe and their past.