How to check PHP-FPM is running properly on a specific domain?

Question

In cPanel, it is possible to enable PHP-FPM for some domains, and disable for some others.

In my server, there is a strange problem:

1. In cPanel, the PHP-FPM is shown as disabled for domain example.com.
2. in WHM, the PHP-FPM is shown as enabled for the same domain example.com

I doubt this is actually a bug of cPanel, so I want to find a way to check whether PHP-FPM is actually running for domain example.com

I check How to check if PHP-FPM is running properly? but this only check if the PHP-FPM service is running on the server, not for a specific domain.