Hello,
You did not upload the favicon https://prnt.sc/1x3py8t
Check now.
Do you use any CDN on your site? Try to clear CDN cache and test your product page again. Because I don’t see that mentioned images are missing on that page https://prnt.sc/1x3tvt5
Also, I would recommend you to try the Nitropack plugin and check if it gives you better optimization results for your site.
Regards