Hi @khubaib411,
Thank you for your follow-up!
If the pages do not appear on the report after pressing the “VALIDATE FIX” button, you are done, and no further action is needed.
Here’s an interesting reference article (FAQ answered by Google’s John Mueller) on SEJ about this topic: https://www.searchenginejournal.com/google-search-console-404-errors-report/499751/
If the page isn’t meant to exist, then having it return 404 is expected.
Usually, if a valid page on your website has been moved without a redirect being put into place, the easiest way to solve this is to implement a redirect. You can implement a 301 redirect if the page has been permanently moved, or you can implement a 302 redirect if the page has only been moved for a short period.
You can learn more about this here- https://seotesting.com/google-search-console/url-not-found-404-errors/
I hope this helps.
Thanks!