No. The whole simulation is made of Geometry Nodes inside the two .blend files: open a file and press Play. It works in Blender 4.5 LTS and newer (tested with 4.5 and 5.2). To reset, go back to frame 1. To keep a result, bake it from the modifier panel (Manage > Bake) like any simulation zone. To use it in your own scene, append the "Falling Sand" or "Falling Sand 3D" collection.