title: Where does gtag pageview's 'page_location' get reported?
body: <p>I'm using the Google Analytics's <strong>gtag.js</strong> on a single-page webapp (SPA).  As <a href="https://developers.google.com/analytics/devguides/collection/gtagjs/single-page-applications" rel="nofollow noreferrer">suggested in the docs for SPAs</a>, I've disabled the automatic <code>send_page_view</code> and instead explicitly send a page view by setting a <code>page_path</code> and <code>page_title</code> to the gtag config. So far, so good.</p>
  
  <p>The docs <a href="https://developers.google.com/analytics/devguides/collection/gtagjs/pages" rel="nofollow noreferrer">also list an optional <code>page_location</code> parameter</a> to send the page's full URL.  For my app's search page, I'm particularly interested in getting the full query params after the <code>?</code> in the URL, so I tried adding it to that payload:</p>
  
  <pre><code>   gtag('config', GA_TRACKING_ID, {
       page_location: window.location.href,
       page_title: 'app search page',
       page_path: '/search',
     });
  </code></pre>
  
  <p>However  I never see a full URL in either the Anlaytics web UI or in its export to BigQuery.  I only the <code>page_title</code> and <code>page_path</code>.  Where does <code>page_location</code> end up getting stored or reported?</p>