A trend I have seen on many blogs is to change the order of comments in WordPress posts so the most recently written comments appear at the top. If your blog posts have many comments, this option can be preferable to prevent the latest comments from being “buried” at the bottom of the page.
Here is how to reverse comment order in WordPress.
Option 1
Go to Settings > Discussion. Under “Other comment settings” find “Older comments at the top of each page” and change the setting accordingly.

Option 2
Add the following code to your theme’s functions.php file:
function wpb_reverse_comments($comments) {
return array_reverse($comments);
}
add_filter ('comments_array', 'wpb_reverse_comments');Here we use the comments_array filter to reverse the comment order.
That is it – hope this tip helps when you want to reverse comment order on your WordPress site.
For more comment customization, see Show the Total Number of Comments in WordPress.