I'm not sure what advice to give here... I spent the past year dealing with very similar friction in my job, and am about to start a new one.
In the end, part of this is about education... refer the people in question to articles surrounding how these things work.
My main concern is that jrsinclair focuses on everything through a "functional filter". I mean, they like functional programming and that's fine, of course.
But if you think about it, is this problem related to functional programming at all? I don't think so. It's simply the well-known, more general problem of "shared understanding and vocabulary in the code of a project". It's not about using flow or pipe or map. It's far more general than that. The same problem arises when you use any construct, any approach, even a single function or expression, that is unfamiliar to the rest of the team.