Error creating postgres extensions

Hi,

I'm having trouble finding in the documentation the steps to install the
postgres extensions such as pg_stat_statements and pg_trgm on
PG13.1/CentOS7. Can someone please assist?

postgres=# create extension pg_stat_statements;

ERROR: could not open extension control file
"/usr/pgsql-13/share/extension/pg_stat_statements.control": No such file or
directory

postgres=# create extension pg_trgm;

ERROR: could not open extension control file
"/usr/pgsql-13/share/extension/pg_trgm.control": No such file or directory

I installed PG13 via the YUM repository
https://download.postgresql.org/pub/repos/yum/13/redhat/rhel-7-x86_64 and
then

I ran "yum install postgresql13 postgresql13-server"

Also, what are the steps to update these extensions in the future when
newer releases are made available. For example, updating

pg_stat_statements from 1.7 to 1.8?

Thanks.

Tiff