This is the default example configuration of pcre provided by Postfix. This config file was generated by Postfix running on CentOS 8.
It is located under: /etc/postfix/dynamicmaps.cf.d/pcre
pcre /usr/lib64/postfix/postfix-pcre.so dict_pcre_open
Download the raw file with wget or curl
wget -O pcre.example http://exampleconfig.com/static/raw/postfix/centos8/etc/postfix/dynamicmaps.cf.d/pcre
curl http://exampleconfig.com/static/raw/postfix/centos8/etc/postfix/dynamicmaps.cf.d/pcre > pcre.example
Other config files you might find useful