Wordpress template_include and visually impaired site version?

Question

PHP

Good afternoon, I need to make a version of the site for people with vision problems. For these purposes, another template is needed and there is actually no problem here. When someone clicks on the "low vision" button, I set a cookie and then it works. template_include
The pluggable version of the template is located in the directory next to the template files. The files are connected and everything seems to be working, but when I click on the details button, then for some reason I go to the page with the post (the URI changes anyway) I don’t see the content, more precisely, the same content is displayed as on the main page .
It turns out that the single.php file is not loaded, but why and how to fix it? Thank you!

Answer 1

Did you try to connect the script for the visually impaired?