UF to indexer and forward specific sourcetype to third-party siem

[_biri_]

Hi, from a customer I have this type, UF with Security events that sends them to a Splunk indexer. I would like to forward these events (only Security ad Application) to a third-party siem.
I tried the configuration found on this post posts but I can't forward these events correctly.

https://answers.splunk.com/answers/400161/how-to-forward-sourcetype-from-a-heavy-forwarder-t.html

https://answers.splunk.com/answers/448100/is-it-possible-to-index-and-forward-a-specific-sou.html

https://docs.splunk.com/Documentation/Splunk/6.4.3/Forwarding/Routeandfilterdatad#Replicate_a_subset...

Does anyone have a working configuration?