Folders missing in sidebar with Big Sur Since I installed macOS Big Sur 11.1, I cannot see the usual folders in the left sidebar of Finder:

even though I have selected them in my preferences:

What is going wrong here and how do I fix it?
Next to &quot;Favorites&quot;, if you hover over it, you should see an arrow you can click to expand the section. It must've been inadvertently clicked, since it's not new to Big Sur.