It works and that’s fine

If you just need the plugin to work, then okay.

If you are going to expand the functionality, then it may be better to look for something else. Spagetti-code without comments, and those that have them are like this:

/**
 * This function is add subscription order status.
 *
 * @name wps_sfw_add_order_statuses_for_payment_complete
 * @param array $order_status order_status.
 * @param object $order order.
 * @since 1.0.2
 */
public function wps_sfw_add_order_statuses_for_payment_complete( $order_status, $order ) {

As you can see, the comments were written by a junior developer. 0 useful information, and how all this can be read in the name of the function