The sample service file is as of 2023-10-23 no longer provided by

the rsyslog project because service settings strongly depend on

distribution policies.

For Debian, the distro current version can be found at

https://salsa.debian.org/debian/rsyslog/-/blob/debian/master/debian/rsyslog.service

Note: We provided a sample service files in the early days of systemd,

when almost nobody was using systemd. That made sense because it eased

transition for those trying out systemd. Now that systemd is mainstream,

there is no real need any longer for a sample.