Remote rsyslog on Debian

How does one enable remote listening with rsyslog (on Debian). Forgive what seems like a super basic question, but all the docs I'm finding about it seem to apply to older versions in which one would simply add a -r to the config options. The /etc/default/rsyslog.config tells me that -r is deprecated, but it does not state what the current method is.

I looked at this: How does one enable remote listening with rsyslog which has a comment about -r being deprecrated, but again, no mention what replaces it.

I confirmed that nothing is listening on port 514 on my server at the moment.

(My goal is to log server traffic through an Airport Extreme router.)

Thanks!