This question stems from a question I asked about the targeting mechanic, if line of effect is necessary to cast spells with a range of "Sight." The current (and only) answer discusses it is not possible to target without line of effect, even if you can see the target.
Misty Step is generally known to pass through walls in this edition. As long as you can see the destination, you can appear in it. As the brief description of that spell states:
Briefly surrounded by silvery mist, you teleport up to 30 feet to an unoccupied space that you can see.
Can Misty Step teleport you to the destination without line of effect?