I am currently playing a Way of Shadow monk, and my character now has a robe of eyes. (I am loving the Waterdeep: Dungeon of the Mad Mage campaign.)
The description of the robe of eyes says, in part (emphasis mine):
You can see invisible creatures and objects, as well as see into the Ethereal Plane, out to a range of 120 feet.
The description of the Way of Shadow monk's Shadow Step feature says, in part (PHB, p. 80; emphasis mine):
When you are in dim light or darkness, as a bonus action you can teleport up to 60 feet to an unoccupied space you can see that is also in dim light or darkness.
Does this mean that I can use Shadow Step to enter the Ethereal Plane, scout around, and then Shadow Step back in on the following round?