I've added blogs(containing images) to my wordpress website. The images are showing in the blog page but not showing in the index page of blogs.
Note: I've verified by switching the themes but the issue still persists.
After researching the issue, I just found a simple solution to that problem. There is an option named "Feature image" while adding/editing a new post, all I needed to do was just add an image here and it shows up in the index page. Nothing too complicated to do.