App Platform Log Forwarding to Self Hosted Log Server

Hi everyone, reaching out from the Axiom team as well to kindly ask why when we use the opensearch plugin output we support here:

output{
  opensearch{
    hosts => ["https://api.axiom.co:443/v1/datasets/$DATASET_NAME/elastic"]
    # api_key should be your API token
    user => "axiom"
    password => "$TOKEN"
  }
}

I dont see logs in Axiom. Is there any config we are mising or something we should be looking at? Thank you.