If you have access to server, try, depending on php version
sudo php-fpm7.0 -tt
sudo php-fpm7.x -tt
sudo php-fpm7.4 -tt
sudo php-fpm8.0 -tt
sudo php-fpm8.1 -tt
sudo php-fpm8.2 -tt
It test the current config file and show config params values (also default ones).
The displayed values can differs from current running config if a modification happened and php-fpm hasn’t been reloaded.
Only tested out on php-fpm 8.1
Note: Output from the command goes to standard error and that makes piping to something like grep or less inconvenient. To account for this:
php-fpm8.2 -tt 2>&1 | grep access