I was replicating the menu shown above with the big
red arrow, which is the default Navigation Block we've been using for awhile in moodle.
The flat drawer/menu on the left in Boost, there SHOULD be a menu item called Courses above My Courses, however it's not part of the drawer, and what is more annoying is that My Courses can not be collapsed, it's also hard to identify that the items under
My courses are sub menu items the indent is so small you can miss it. At .5rem the indent is much better than the default .25rem.
It's a difficult theme to like. Forces you to do things the way it wants, which is dull and not intuitive.