Previously you could map a keyboard shortcut for Go to main component in library
but that menu option now appears to be missing, thus breaking the keyboard shortcut set up in macOS system settings. Now the only way to get to the main component is via a context menu in the canvas or clicking the button on the right panel. Neither of which is mappable to a keyboard shortcut.
This post was solved with the keyboard shortcut until that menu item was removed.
It seems dumb but I honestly used that keyboard shortcut every day and it will be sorely missed.