Three new payment systems are now available in the integrations section. You connect them the same way as the others: take the credentials from your payment system account and paste them into the integration settings. The steps are described in How to integrate a payment system on Kwiga.
Paddle sells your courses under its own name and calculates and pays the sales taxes in the buyer's country itself. That takes VAT handling on international sales off your plate.
Mollie adds the payment methods European students are used to, alongside cards.
NOWPayments accepts payments in cryptocurrency.