The Google search console shows the issues with the site and pages as when the Google crawler crawls the pages. The issues will be shown in the Google Search Console dashboard under Indexing > Pages.
We can search for “Why pages aren’t indexed” under Indexing > Pages to look for the issues with pages.
The possible issues with indexing could be:
Here is how it looks on the search console. To see the details of each issue you can click on the title of the issue.