minecraft-assets/assets/minecraft/blockstates/bedrock.json

{
  "variants": {
    "": [
      {
        "model": "minecraft:block/bedrock"
      },
      {
        "model": "minecraft:block/bedrock_mirrored"
      },
      {
        "model": "minecraft:block/bedrock",
        "y": 180
      },
      {
        "model": "minecraft:block/bedrock_mirrored",
        "y": 180
      }
    ]
  }
}