minecraft-assets/data/minecraft/recipes/respawn_anchor.json

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    "OOO",
    "GGG",
    "OOO"
  ],
  "key": {
    "O": {
      "item": "minecraft:crying_obsidian"
    },
    "G": {
      "item": "minecraft:glowstone"
    }
  },
  "result": {
    "item": "minecraft:respawn_anchor"
  }
}