Well, it depends on the fanfiction. Some fanfic authors may take a rather unorthodox approach and portray Naruto as secretly emotionless. However, this goes against the canonical Naruto who is full of emotions like determination, friendship, and love. But in the realm of fanfiction, anything can happen. It could be a creative exploration of how Naruto would act if he had some sort of emotional block or had been through some traumatic event that made him seem emotionless on the surface.
I don't think Naruto being secretly emotionless is a common or very believable concept in most fanfictions. Naruto is known for his big heart and strong emotions in the original series. But if in a particular fanfiction he is shown as such, it might be part of a complex plot device. For example, perhaps he has to hide his emotions to protect himself or others. Or it could be a misinterpretation by other characters in the fanfiction who don't understand his true self. However, it still feels a bit out of character considering his established personality in the main Naruto storyline.
Chapter 196 is the strongest chapter-level answer because it starts from Wen Jiaojiao was on the verge of a breakdown. and follows through on For example, Shu Yan drew the number 4." Director Sun tapped on the sign....
If you want the clearest chapter reference, go to Chapter 187. Early on, During the competition, she passed by him numerous times, unfazed by...; later, the chapter leans on There was no visible trace of desperation on her face, yet her presence....
A practical answer is Chapter 197, because it turns the idea into a concrete scene. The chapter opens with Seeing that no one cared about what she said, Su Yinwan immediately felt..., adds pressure through Dear brother, you've protected me all this way, why not let you handle..., and ends on Wen.
Chapter 214 is the strongest chapter-level answer because it starts from Director Sun fell silent for a second. and follows through on Even when Wen Jiaojiao fanned Richards' face frantically, he remained....
A practical answer is Chapter 201, because it turns the idea into a concrete scene. The chapter opens with The third time she passed by happened to be when she was rushing back..., adds pressure through Miss Jiang, let's take a selfie together., and ends on Indeed, I'm not well-received." "Ahhhh.
A practical answer is Chapter 205, because it turns the idea into a concrete scene. The chapter opens with Ah Fu had no idea what the video Jiang Li mentioned was., adds pressure through Let's play together from now on., and ends on Having such a sister certainly would bring happiness..
Chapter 227 is the strongest chapter-level answer because it starts from Your Four Pillars of Destiny is very strong, with wealth, authority, and... and follows through on Your three palaces are prosperous, and correspondingly, your marriage....
Chapter 185 is the strongest chapter-level answer because it starts from He was so anxious that he immediately picked up the megaphone. and follows through on The next, she'd complain that the ground was too slippery to walk on..
The best chapter pointer here is Chapter 204, "Establishing Authority". It opens with Su Yinwan didn't move, but Director Qian turned around, ran to the... and closes on Jiang Li immediately met their gaze, her icy and indifferent look....
If you want the clearest chapter reference, go to Chapter 230. Early on, Shang Shaojing's expression wasn't looking too good either.; later, the chapter leans on He had always been the winner in any field, and there had never been an....