ILM Policy not working (not deleting indices of settled duration)

Question

I am using elk version 8.0.0 in Windows OS. There are totally of 3 elk nodes 2 logstash and 1 kibana node.

The ILM is not working based on the duration I set (ex:5mints,the data is not getting deleted).I have created ILM template and assigned metricbeat 8.0.0 or metricbeat-*(tried with both) but data deletion is not happening. There is no error in all 3 Elasticsearch nodes logs and in kibana also and it's showing success while I click on the save policy.

Below is the source code which I implemented from my end (which is not working):

PUT _ilm/policy/metricbeat
{
    "policy": {
        "phases": {
            "hot": {
                "min_age": "0ms",
                "actions": {
                    "set_priority": {
                        "priority": 100
                    }
                }
            },
            "delete": {
                "min_age": "5m",
                "actions": {
                    "delete": {
                        "delete_searchable_snapshot": true
                    }
                }
            }
        }
    }
}