You can extend avatar on user profile page by filter hook as following.
function user_profile_filter_user_avatar($user_avatar){ if(isset($_GET['id'])){ $user_id = sanitize_text_field($_GET['id']); //var_dump($user_id); } else{ $user_id = get_current_user_id(); } // grab new avatar $user_avatar = get_avatar($user_id, 500); ?> <div class="new-avatar"> <?php echo $user_avatar; ?> </div> <?php } add_filter('user_profile_filter_user_avatar','user_profile_filter_user_avatar');