Is there a function to edit Blogs contents in Blogs page?

There is a filter called the_content which you can use to do anything you like with the content. If you want to constrain this to certain pages, you must add an extra condition. It is not completely clear what you mean by ‘blogs page’. The condition for the blogs home page is is_home or else you might need is_archive. Like this:

add_filter ('the_content','wpse280327_the_content');
function wpse280327_the_content ($content) {
  if (is_home) { 
    ... do stuff with $content ...
    }
  return $content;
  }