pumpkin-java-multiversion/assets/datapacks/26_2/data/minecraft/recipe/sandstone_wall.json

{
  "type": "minecraft:crafting_shaped",
  "key": {
    "#": "minecraft:sandstone"
  },
  "pattern": [
    "###",
    "###"
  ],
  "result": {
    "count": 6,
    "id": "minecraft:sandstone_wall"
  }
}