How can I see what pages are indexed in Google?

Log into Google Search Console.
Navigate to Crawl Fetch as Google.
Take the URL you'd like indexed and paste it into the search bar.
Click the Fetch button.
After Google had found the URL, click Submit to Index.

Indexed pages can be checked by typing the code below in the search engines. The result will display only the indexed pages of your website.

SITE:URL