mypmpro-add-sofort-payment-method.php

<?php //do not copy

/**
 * This recipe will add the Sofort payment method in Stripe Connect. 
 * Note that this will only work with EUR payments
 * 
 * Add this code to your PMPro Customizations Plugin - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 * Works for PayPal Express and Stripe payment gateways.
 * www.paidmembershipspro.com
 */

function mypmpro_set_sofort( $checkout_session_params, $morder, $customer ) {

	$checkout_session_params['payment_method_types'] = ['card', 'sofort'];

	return $checkout_session_params;
}
add_filter( 'pmpro_stripe_checkout_session_parameters', 'mypmpro_set_sofort', 10, 3 );