Is it possible to use dynamic_templates?

Plugins Index Management
1

Hi,
is it possible to use dynamic_templates?
opensearch_version: “1.3.3”
The objective: set type text to any fields in path log_processed.data.*

If I set the type statically (like second test-2) it works as expected. But I would like to be able to set type dynamically, because it is not known what fields will be in the future.
The first example test-1 doesn’t work as expected. And I don’t know why :frowning:

PUT _index_template/test-1
{
  "index_patterns" : [
    "test-*"
  ],
  "template" : {
    "mappings" : {
      "dynamic_templates" : [
        {
          "log_processed.data" : {
            "match_pattern" : "regex",
            "match" : "^log_processed.data.*",
            "match_mapping_type":"*",
            "mapping" : {
              "type" : "text"
            }
          }
        }
      ]
    }
  }
}
PUT _index_template/test-2
{
  "index_patterns" : [
    "test-*"
  ],
  "template" : {
    "mappings" : {
      "properties": {
        "log_processed.data.a": {
          "type" : "text"
        }
      }
    }
  }
}

Maybe I didn’t configure something else? Or maybe I did something wrong? Is it even possible to use dynamic_templates?