core/homeassistant/components/ipp/icons.json

{
  "entity": {
    "sensor": {
      "printer": {
        "default": "mdi:printer"
      },
      "uptime": {
        "default": "mdi:clock-outline"
      },
      "marker": {
        "default": "mdi:water"
      }
    }
  }
}