Shrine puzzles are scattered across Hyrule in The Legend of Zelda: Tears of the Kingdom. One of those puzzles is the “Bridging the Sands” puzzle found in the Kudanisar Shrine, which is located in the northern part of the Gerudo Desert near Karusa Valley. Here’s how to solve the Shrine puzzle.
How to solve the Kudnaniser Shrine puzzle in The Legend of Zelda: Tears of the Kingdom

This Shrine features a massive room, filled with moving sand. Moving in the sand will quickly drain your stamina bar, so you will want to try and avoid that as much as possible. The main shrine exit is straight ahead from the starting point, in the middle of the leftmost wall. On the opposite side of the room is another platform with some Zonai enemies on it and a smaller platform with a single Zonai enemy on it, where the optional chest is located.
The first step is getting out of the fenced area you start in. There is a wooden plank standing straight up in the sand at the bottom of the stairs. There are two more planks moving across the sand, respawning whenever they go underneath the wall. Using a combination of Ultrahand and Recall, you need to get all three planks and yourself to the stone platform across from the stairs. Once here, connect all three planks end-to-end to create a big bridge, which you can lean against the fence to exit this section.