tutor_after_add_to_cart_button

function add_buynow_after_addtocart() {
// get the current post/product ID
$product_id = tutor_utils()->get_course_product_id();
// get the "Checkout Page" URL
$checkout_url = wc_get_checkout_url();
// Buy now button
echo '<a href="'.$checkout_url.'?add-to-cart='.$product_id.'">Buy Now</a>';
}
add_action( 'tutor_after_add_to_cart_button', 'add_buynow_after_addtocart' );