We can see face orientation, but can't select by face orientation. — Right-Click Select
Face orientation colours? - Modeling - Blender Artists Community
Face Orientation & Normal Direction - Blender Tut - YouTube
Settings for „Face Orientation” overlay — Right-Click Select
John Dickinson on Twitter: "#BLENDER | For those who have asked how I set up my Face Orientation. This way you only see the back faces. I also leave the Face Orientation
mesh - display face normal direction in blender 2.8 - Blender Stack Exchange