Adding pagination to the top of search results

Here is the site I am working on:

https://www.vjortho.com/category/shoulder/

There is pagination at the bottom, but not the top. From looking at the code I found the bottom pagination is put there using:

<?php wp_pagenavi(); ?>

… in loop.php, so i tried to add that same line to various places earlier in the page but nothing shows.

I had though wp-pagenavi was a plugin, but it is not listed as an active plugin so I am not sure why that is.

So, I am wondering where I can put the above line of code in th eloop.php page so that I get pagination at the top as well. Thanks.