Option for a role to be a divider

This seems like a fairly straight-forward, low hanging fruit, while providing a lot of value. 

I know Discord is made in Electron, with React, so I built a concept:
https://codesandbox.io/p/sandbox/xenodochial-leaf-l26yrc

Below implementation is not manageable. And it seems that you break these dividers every UI update. Which makes it hard for people who manage discords - like myself, to keep updating this stuff.  

Pls hire me, I love problem fixing. 4 years of experience in React, would love to work with you guys.