Do not enable these services. PC-BSD/TrueOS has abandoned its GitHub repository that these services install softwares from, leaving it available for any random person to hijack.
Appcafe is one giant service in the Mewburn rc system.
That is not the case here.
Here, it comprises:
one target: appcafe, which is what is enabled when one enables "appcafe"
four distinct services: appcafe-nginx, appcafe-dispatcher, appcafe-php-fpm, and appcafe-ssl-keygen, which are wanted by that target when they are enabled
Additionally, in the Mewburn rc system Appcafe is configured by a subsystem-specific configuration file in /usr/local/etc/appcafe.conf.
Here, the rc.conf conversion subsystem permits the Appcafe settings there to be overridden with normal rc.conf settings:
appcafe_nginx_portport= in /usr/local/etc/appcafe.conf.appcafe_nginx_sslssl= in /usr/local/etc/appcafe.conf.
If you are looking for the nginx.conf used by the appcafe-nginx service, it is in that service's own service directory.
The external configuration conversion subsystem copies it from the originals in /usr/local/share/appcafe, leaving them untouched, and edits in the port and ssl configuration.