Why Does Xcode Use list.bullet SF Symbol for the "Sidebar" Toolbar Item Instead of sidebar.left

I just noticed this but am curious:

Why does Xcode use list.bullet SF Symbol to toggle the "navigators" (sidebar) instead of sidebar.left?

For the inspectors Xcode uses "sidebar.right" but I don't understand why the left sidebar uses a different icon from the right sidebar? Shouldn't the left sidebar icon match the right sidebar (just flipped)?

Am using the wrong SF Symbol in my app to toggle the sidebar? Is the list.bullet the recommended symbol for this now? Every other app seems to use sidebar.left.

Why Does Xcode Use list.bullet SF Symbol for the "Sidebar" Toolbar Item Instead of sidebar.left
 
 
Q