Comment # 1 on bug 1118068 from Dr. Werner Fink

Created attachment 791575 [details]
/etc/systemd/system/syslogd.service

For SLES-15 and Tumbleweed this already fixed a long time

@@ -18,23 +18,19 @@
 Description=System Logging Service
 Conflicts=syslog-ng.service rsyslog.service
 Requires=var-run.mount
-Requires=syslog.target
+Requires=syslog.socket
 Requires=network.target
 Requires=klogd.service
-Before=syslog.target
 Before=klogd.service
-After=var-run.mount
-After=network.target

you might test out the attached service unit file, which *after* current syslog
service has been stopped with systemctl, should be used as
/etc/systemd/system/syslogd.service by daemon-reload, activation, and start.

Does this work for you?