Is Quick WebP working?

Hi, I downloaded the Quick WebP plugin yesterday. I have activated it, but on the settings page, where there is a section called ‘Bulk optimization’, it is still showing as ‘0/180’. Has Quick WebP started to optimise the images on my site? Also, how will I be able to tell, either in the CMS or by inspecting the image on the front end whether the file size has been reduced? I must be missing something and would appreciate any help to get it running. Thanks.

The page I need help with: [log in to see the link]