I've emphasized the thing she actually cares about. Her youtube, and money making, and skinship with her friends are just results of her trying to keep things the same. Youtube and moneymaking schemes are just about spending time with her friends. Being touchy-feely with them is just her trying to address the loneliness she's feeling.
Also there's not really anything wrong with Chita being physically affectionate with her friends. Especially since they are all that way with each other.
Watching her slowly decide to move forward in life (this is where Tokio comes into play) will be incredibly rewarding (if the author continues to do it).
It's certainly more slow burn storytelling than some of these characters getting over their issues in more or less 6 chapters (Inuyama and Toyoda).
There needs to be more storytelling like Seto's career indecision.
Your initial point seemed to emphasis growth of her character, which was my focus. I'm not saying that she
can't grow as a character, simply that we haven't been shown any, to my recollection - and trying to reframe it as "future growth, if the author decides on it" is shifting the focus of what you'd initially said.
Per the section you quoted - I read those more as simply "characterizations" of Chiita, rather than explicit examples of her progressing her arc as a character within the narrative.
Per the portion you
highlighted, I would say that is the onus of her character's current tension with the others and the narrative at large, and it's been that way for a good while now with no real movement by herself to resolve the inherent conflict that brings with the other characters. And, none of the other characters have taken significant steps to address it, either.
Even with Tokio, she's sitting in stasis on her feelings, if any, toward him, while he's already committed and is now in a holding pattern waiting on her.
If the author is going to do something with her character in terms of actual growth, then everything I've said is moot, and I'm okay with that - but at present, one of the actual significant parts of her entire character profile is her apparent fear of things changing when she doesn't want them to, which I interpret as the opposite of growth in a character, as no one is actually addressing the fact that she wants everything to stay in stasis even as they seek to move forward in their own ways.
Like in chapter 202 when she pulls Toyoda & Anjou to the night pool - they were studying, and she got mad at them not spending time with her and interrupted that. Yes, she's owed time with her friends, but she basically whined at them until they relented, when they had important things they were focusing on, because it's what
she wanted.
They went along with her, because the two of them are very easy-going like that; but at minimum Anjou is studying because of her goal of improving her grades to meet the expectations of her mother, and Chiita directly interfered with that because she wanted to goof off and not think about school coming up, because that meant time was passing and things were going to change around her.
To your other points - Chiita being physically affectionate is whatever, because Anjou and Toyoda aren't pushing back on it that I can recall; and Seto's indecision does need to be addressed per his character arc, but that also feels like switching topics entirely from what you had initially said, so I won't spend more comment space on it here.