Looks like your running a recent version of Ubuntu, I don’t use it, but I would venture a guess “service” is redirected to systemctl like most other distros. A few mins on Google should answer that.
There is an option on journalct (ForwardToSyslog) usually its on by default, however, that’s going to vary between distros.
This may help with with what you would like to do. Linux Logging with Systemd - The Ultimate Guide To Logging
I’ve not tried what you are looking to do, so I can’t really help with that specifically.