When someone is looking at Vanilla Comments, the url structure will have #vanilla-comments appended to the URL.
Out of the box, Google Analytics will ignore the hashtag, so you will not to be see the differentiator between your content and comment views. To separate them, you will need to modify your Google Analytics code to the following
gtag('config', 'GA_TRACKING_ID', {
'page_path': location.pathname + location.hash
});
Please note a couple of caveats:
This will not work without refreshing the page. So it works best when people click to read/view comments. You need Google Tag Manager to track this behaviour in a non-refresh state.
Also this change, will also mean all urls on your website with a # in your URL structure, will be tracked as separate url record in your Google Analytics - so make sure this is on a filtered view.