To check indexed page type of google search bar site: then your URL exmple "site:https://stubcreator.com/"
After typing this your will able to see the result only indexed page only.
Check into sudden drops. If you see a sudden drop in the number of indexed pages, it might mean that your server is down or overloaded, or that Google is having trouble accessing your content. Make note of unusually high index volume for your site.