Hello.... Tell me how to make comments on a separate page, in the likeness of item2.php ?

@atba
You probably cannot do that, you chould just use some parameter in URL to split content. But if you saw it somewhere and you want to do that as well because other people do it, it does not make sense... why would you split content if it can be on 1 page without reload? especially if you have pagination here as well... it is against customer experience.

It is necessary not because where saw... It is simply necessary that comments to the product are indexed separately on the page: "comments to the product""
Is that hard to do?

I created a file in the likeness of item2.php, but now how to set a link to this page and how will the meta tag be formed?

@atba
That's not smart reason.
I would create:
- item_data.php
- item_comments.php

Item data contains standard data about listing, comments one just comment... both just body. Then include them into item.php and show desired based on some parameter.