Adyen supports iDeal recurring via SEPA across all integrations (including the current HPP Wiki uses)payment request: https://docs.adyen.com/classic-integration/recurring-payments/store-payment-details

example: https://docs.adyen.com/classic-integration/hosted-payment-pages/payment-request

applicable for recurring as well, just need to pass in 'ONECLICK,RECURRING' to recurringContract field: https://docs.adyen.com/classic-integration/hosted-payment-pages/one-click-payments