You can easily spot this collectible if you enter Court of Contempt from south. There is a part of the main road that leads to this area. You can find NPC Malkur Valos at this location. Malkur gives the quest “Hall of Judgment”. This quest is part of Court of Contempt Objective.
Shard is on a wrecked stone wall, Close to the tall stone towers.
Sand Kingdom Moons - Super Mario Odyssey Power Moons