arfoundation-samples/Packages/manifest.json

{
  "dependencies": {
    "com.unity.xr.arcore": "1.0.0-preview.18",
    "com.unity.xr.arkit": "1.0.0-preview.14",
    "com.unity.xr.arfoundation": "1.0.0-preview.17"
  }
}