Since the new tool’s release, it was only available to a limited number of users. Google started rolling out slowly to more and more users. As of July 10, 15 days, after the first announcement of the tool, Google says the tool is available to everybody.
The tool can be accessed within the new Google Search Console over here.
With the URL inspection tool, you can check a specific URL on your website to see the status of how Google search sees that URL. This tool “provides detailed crawl, index, and serving information about your pages, directly from the Google index,” Google says. It’ll show the last crawl date, the status of that last crawl, any crawling or indexing errors and the canonical URL for that page. It will even show if the page was indexed successfully, any AMP errors, structured data errors and indexing issues.
— Google Webmasters (@googlewmc) July 10, 2018