Okay, not to get overly analytical here but this chapter is a huge point of catharsis for Iori as a character.
Ever since Hazuki and Iori started dating you can tell that Iori has struggled with his role in the relationship because of his gender. He felt like he constantly needed to prove his manhood to Hazuki by showing how reliable he was, despite the way he usually dressed and acted more femininely. He kept trying and failing to live up to this imaginary standard of masculinity until this chapter, where it turns out that the way Iori finally proved his reliability was through cooking, a stereotypically feminine thing.
It’s just like
@theroadstopshere said; “Girls can be chads and occasionally himbos, and guys can be wifeys and occasionally princesses.” The key here is that being a wifey or a princess doesn’t have to conflict with being a guy. I think that’s the lesson Iori learned in this chapter.