Are there any examples of extract_array for palo alto firewalls for config and system logs?
Sorry I don't think I understand your question
extract_array is a filebeat processor: https://www.elastic.co/guide/en/beats/filebeat/7.8/extract-array.html
If you want to use the panw module, you can use ./filebeat modules enable panw and then you should see panw.yml in modules.d folder, which looks like https://github.com/elastic/beats/blob/master/x-pack/filebeat/modules.d/panw.yml.disabled
Currently the panw module only parses Traffic and threat logs. I need to also parse config and system logs which are sent to Elastic Search.