core/homeassistant/components/analytics_insights/icons.json

{
  "entity": {
    "sensor": {
      "core_integrations": {
        "default": "mdi:puzzle"
      },
      "custom_integrations": {
        "default": "mdi:puzzle-edit"
      },
      "total_active_installations": {
        "default": "mdi:puzzle"
      },
      "total_reports_integrations": {
        "default": "mdi:puzzle"
      }
    }
  }
}