php-fpm not creating socket - php

Question

I'm setting up a WordPress website using Apache and php7.4-fpm.
I'm aware that the most common misconfiguration in this combination is a mismatch between the socket definition in the configuration files of both httpd and php-fpm.
I've created both configurations and restarted both services.
After restarting both services, attempts to load the website fail. The logs indicate that the socket can't be reached. When I check the filesystem, I can see that the socket hasn't been created.
This is the vhost configuration:
<VirtualHost *:80>
DocumentRoot /var/www/mysite.localdev
Servername mysite.localdev
<Directory /var/www/mysite.localdev>
AllowOverride none
FallbackResource /index.php
Require all granted
Options Indexes FollowSymLinks MultiViews
</Directory>
#ProxyPassMatch ^/(.*\.php(/.*)?)$ fcgi://127.0.0.1:9000/var/www/mysite.localdev/$1
ProxyPassMatch ^/(.*\.php(/.*)?)$ unix:/var/run/php/mysite.sock|fcgi://127.0.0.1:9000/var/www/mysite.localdev
DirectoryIndex index.php /index.php
ErrorLog ${APACHE_LOG_DIR}/mysite.localdev.error-log
# Possible values include: debug, info, notice, warn, error, crit,
# alert, emerg.
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/mysite.localdev.access-log combined
</VirtualHost>
and this is the pool configuration
[mysite]
user = mantis
group = mantis
listen = /var/run/php/mysite.sock
listen.owner = mantis
listen.group = mantis
pm = dynamic
pm.max_children = 5
pm.start_servers = 2
pm.min_spare_servers = 1
pm.max_spare_servers = 3
php_admin_value[post_max_size] = 5G
php_admin_value[upload_max_filesize] = 5G
What could be preventing php from creating the socket?