Including author avatar on post-meta not working on child theme

Hello,

I am trying to include the author avatar in the post-meta template to get the photo to show in the category posts loop. I am doing it through the child theme (/generatepress_child/inc/structure/post-meta.php), but the modifications are not visible if I don't change it in the parent theme file.

Any idea? The modified code is this:

if ( 'author' === $item ) {
		$schema_type = generate_get_schema_type();
		$avatarphoto = get_avatar( get_the_author_meta( 'ID' ), '40') ;

		$byline = '<span class="byline"><span style="width:50px;vertical-align: middle !important;">'.$avatarphoto.'</span> %1$s<span class="author%8$s" %5$s><a class="url fn n" href="%2$s" title="%3$s" rel="author"%6$s><span class="author-name"%7$s>%4$s</span></a></span></span> ';

Thanks in advance!