@thanh25896,
There are two following options to do that.
1. You can use the following CSS code:
div.wc-comment-author > a {
color: currentColor !important;
cursor: not-allowed !important;
text-decoration: none !important;
pointer-events: none !important;
}
The CSS code should be added in the Dashboard > Comments > Settings > Styling > "Custom CSS code" textarea.
2. or you can use the following JS code:
jQuery(".wc-comment-author > a").removeAttr("href");
The js code you should add in your active them's js files.
Here is the instruction on how to add a js file or js code in the active theme:
https://www.wpbeginner.com/wp-tutorials/how-to-easily-add-javascript-in-wordpress-pages-or-posts/
In any case, please don't forget to delete all caches and press Ctrl+F5 (twice) on the frontend before checking to reload the updated CSS/JS files.