Hello there,
Unfortunately, it is not possible to make the icon less thick.
On the other hand, try adding the following code into the functions.php file of your active theme to see if the icon style problem is corrected:
if (defined('YITH_WCWL')) {
if (!function_exists('yith_wcwl_enqueue_back_required_assets')) {
function yith_wcwl_enqueue_back_required_assets()
{
$suffix = defined('SCRIPT_DEBUG') && SCRIPT_DEBUG ? '' : '.min';
$version = defined('WC_VERSION') ? WC_VERSION : '';
wp_enqueue_style('woocommerce_prettyPhoto_css', plugins_url('assets/css/prettyPhoto.css', WC_PLUGIN_FILE), array(), $version);
wp_enqueue_script('prettyPhoto', plugins_url('assets/js/prettyPhoto/jquery.prettyPhoto' . $suffix . '.js', WC_PLUGIN_FILE), array('jquery'), '3.1.6');
wp_enqueue_script('prettyPhoto-init', plugins_url('assets/js/prettyPhoto/jquery.prettyPhoto.init' . $suffix . '.js', WC_PLUGIN_FILE), array('jquery'), $version);
wp_enqueue_style('yith-wcwl-main', YITH_WCWL_URL . 'assets/css/style.css', array('jquery-selectBox'));
}
}
if (!function_exists('ywfav_add_fontawesome')) {
function ywfav_add_fontawesome()
{
wp_enqueue_style('fontawsome', 'https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css');
}
add_action( 'wp_enqueue_scripts', 'ywfav_add_fontawesome', 99 );
}
}
Check it out and tell us any news, please.
Best regards.