Is there an API for the Mobile Toolbar?

I fancy some sick mods to the mobile toolbar. The obsidian docs are pretty scant on it though; seems like Commander uses SCSS to modify the style of the existing toolbar but I want to work on it in JS, ideally in React. Any idea how this could be achieved?

The editing toolbar by @Cuman is pretty dope and I might settle for making edits to that if not the built-in toolbar.

Sick mods complete: Finally, a seamless mobile toolbar!