gistfile1.txt

add_filter( 'woocommerce_product_add_to_cart_url', 'custom_woocommerce_product_add_to_cart_url', 10, 2 );

function custom_woocommerce_product_add_to_cart_url( $url, $product ) {
  if ( $product->is_type( 'simple' ) ) {
    $url = get_permalink( $product->id );
  }
  
  return $url;
}