Add content under a text

Hi. I would like to add some content just under the message as shown in the attached image. I’ve looked many ways to include it in “class.WpdiscuzWalker.php” but I can’t find where to do it.

Example
My website: https://generacionxbox.com/

Code i need insert.

<div class="gamerTag">
						<a href="https://account.xbox.com/es-ES/Profile?gamerTag=<?php echo esc_attr( get_the_author_meta( 'direccion', $comment->user_id ) ); ?>" target="_blank">
							<?php if(esc_attr( get_the_author_meta( 'direccion', $comment->user_id )) != "" ){ ?>
							<img style="width:100%;margin-top: 10px;"src="https://www.mygamerprofile.net/card/bar/<?php echo str_replace(' ' , '+' , esc_attr( get_the_author_meta( 'direccion', $comment->user_id ) )); ?>.png">
							<?php } ?>
						</a>

				</div>