In Strapi headless CMS V4, if you want add some specific type column (such as tstzrange type PostgreSQL offered), you can code like this

schema.json

{
  ...
  "attributes": {
    "effective_range": {
      "type": "string",
      "columnType": {
        "type": "specificType",
        "args": [
          "tstzrange"
        ]
      }
    }
  }
}