const assets = await client.assets.retrieve([{id: 123}, {externalId: 'abc'}]);

{
  "items": [
    {
      "createdTime": 1730204346000,
      "lastUpdatedTime": 1730204346000,
      "rootId": 4503599627370496,
      "name": "<string>",
      "id": 4503599627370496,
      "aggregates": {
        "childCount": 1,
        "depth": 1,
        "path": [
          {
            "id": 4503599627370496
          }
        ]
      },
      "parentId": 4503599627370496,
      "parentExternalId": "my.known.id",
      "externalId": "my.known.id",
      "description": "<string>",
      "dataSetId": 4503599627370496,
      "metadata": {},
      "source": "<string>",
      "labels": [
        {
          "externalId": "my.known.id"
        }
      ],
      "geoLocation": {
        "type": "Feature",
        "geometry": {
          "type": "Point",
          "coordinates": [
            123
          ]
        },
        "properties": {}
      }
    }
  ]
}