This shard is inside Dead Man’s Drop solo dungeon. Its entrance is overlooking the nearby shore. “Pirates of the Abecean” lorebook can be found at the entrance of the cave.
Another shard that had its location moved due to post-launch changes. Now, you can find it in the northwestern part of the dungeon. It is located on a high cave platform. You should follow the path in the eastern part of the cave to reach this spot.
Find and enter Dead Man’s Drop solo dungeon.
Dead Man’s Drop entrance map location.
A rather epic cave formation is also found nearby.
Exact location of the shard.
Sand Kingdom Moons - Super Mario Odyssey Power Moons