The Journald integration is not yet supported in Elastic 8 as indicated in package page:
I did a test installation of Elastic 8.1, and indeed the package doesn't appear when searching for it in the integrations page in Kibana.
Compared to the System integration syslog dataset, the jouranld data is richer.
I'm curious about the future of the jouranld integration. With the prevalence of systemd based distros, perhaps it can be part of the System integration.
The experimental flag and integration not being part of the 8 release is somewhat disappointing. Are their any plans for it? Or is not a priority?