Dead Letter Queue and its usage

Elastic Stack Logstash
7

I was able to write to dead letter queue successfully but despite putting in configuration for re-processing them, I'm unable to see the processed objects in elastic search.

Is there a setting that explicitly tells logstash to send it back again to elastic search?

I have a file called dlq.conf in the /etc/logstash/conf.d/ directory that looks like.

input {
        dead_letter_queue {
        path => "/var/lib/logstash/dead_letter_queue"
        pipeline_id => "main"
        commit_offsets => true
    }
}

Also my logstash.yml looks like

/etc/logstash/logstash.yml file
config.reload.automatic: true

log.level: info

pipeline:
  id: main
  workers: 2

path:
  config: "/etc/logstash/conf.d/*.conf"
  data: "/var/lib/logstash"
  logs: /var/log/logstash

queue:
  type: persisted

dead_letter_queue.enable: true
path.dead_letter_queue: "/var/lib/logstash/dead_letter_queue"