How to make sure that OpCache is caching files of my website ? (Prestashop)

I am trying to use Opcache on my Prestashop Website, I installed it and it seems active (see here) , but I want to be sure that it’s actually caching the PhP scripts.

I have been looking into the configuration array that delivers some info about Opcache (see here) but I want to see exactly which files are cached (and possibly also where).

Also, is there a way to see the effect of Opcache on my website between: when activate vs deactivate ?

Thanks a lot