I agree that having the little-used hamburger-to-close icon taking up the most valuable upper left easy target space on the window is non-optimal.
Here’s what cloudflare has at the bottom of their sidebar:
Seems like someone who knew a bit more than I about CSS (or maybe the DOM?) could make a theme component pretty quickly, but probably the thing is a PR that fixes the template.
It could even be the top item in the sidebar. . .