Thank you for contacting WPML support, I'd be happy to help you with this issue.
Now I do not see many "SER5" products on your shop page in the default language (en). I also use the search form in the header to search for "SER5" products and also do not see translations on the search page in the default language. Please check this screenshot hidden link
Did you resolve the issue on your end or am I missing something?