Hi Harald,
Thanks for reaching out.
Is there any visible issue, error, or performance related issue caused by this outdated templates?
It’s because that message or analysis are only based on versions added to the template files. It doesn’t really check the compatibility of the code within those templates, the template content remains the same but they just change the version number. We’ll certainly update the version too within those templates along with our theme updates, but as what to fix, there is nothing to fix in the code unless there are issues or error caused by those templates.
And those templates are usually from Woocommerce itself too with same code, but we only added few structure to match the theme design. I was also comparing the template codes versus Woocommerce templates and they are the same too.
Thanks!