Can it be configured to send data to Elastic and or Splunk ?
What app? This is a use case for my company's product, Cribl (https://cribl.io/). Without knowing what you're asking about though, can't say one way or another.
Also your link is busted : (
Answers added a ) after the link, smart.
No, Add-on for Linux will not help you send data to Elastic. It works well with Splunk though. Splunk Add-Ons are apps designed to help make data gathering for known systems easier. Elastic has their own set of data gatherers they call beats which help in that area.
The Splunk Add-on for Linux