To see which of your website's pages are currently on Google, in the search bar insert site: and your domain name, like this: site:example.com. This way, you'll see the total number of search results related to your website:

And, if you click on the vertical ellipsis button ⋮ next to each result, you can find out more information about that page:

If you can't find your website on Google, one of the main reasons may be that your site has been launched very recently. It can take from 4 days to 6 weeks for a site to be crawled and indexed by Google. Make sure you have SEO settings up-to-date and give it some time 🚀

NOTE: You can request Google to index your website pages by using Google Search Console