You can perform the following command which checks if the file exists on the current server:
Quote#find / -name ModCloudflare.pm
You should be able to get output like below:
QuoteOutput : /var/cpanel/easy/apache/custom_opt_mods/Cpanel/Easy/ModCloudflare.pm
Alternatively, you can use the command below to check if cloudflare module is installed OR not.
Quote#httpd -M|grep cloudflare