A SEO expert has done an evaluation on a client site of ours, and expresses their concern about Client side rendering of product pages, in which none of them are appearing in Google. This SEO expert explained that CSR of pages was devastating to my client's ranking.
I'm not a programmer, but for me, it looks like product listings are done with placeholders such as {{name}} etc inside loops, with content type x-templates. Google cannot tell me what x-templates are, but I assume it is some type of script.
I found nothing on client side rendering and seo in the documentation, so I was hoping some of you might help me out.
Should my client be concerned with the way the product pages are rendered or are other ways to ensure their best possible ranking in Google?