You can execute return rules based on the used payment gateway in the order.
You need to put the "technical value" in this field, not the regular name of your payment gateway.
Here are the technical values for some frequently used payment gateways.
Shopify Payments --> shopify_payments
PayPal --> paypal
Stripe --> stripe
Authorize.net --> authorize_net
Afterpay (US) --> afterpay_north_america
Afterpay (Worldwide) --> afterpay
Shopify Gift Card --> gift_card
Amazon Payments --> amazon_payments
Klarna
US --> buy_now_pay_later_with_klarna
Finland (Maksa Myöhemmin) --> maksa_myöhemmin_klarna
Finland (Pilko Maksut) --> pilko_maksut_klarna
Sweden (Betala senare) --> få_först_betala_sen_klarna
Norway (Få først. Betal senere) --> få_først_betal_senere_klarna
Checkout Finland --> checkout_finland
Sezzle --> sezzle
PayPlug --> payplug
Braintree --> braintree
SeQura --> sequrapart_payment
Vipps --> vipps
QuadPay --> quadpay
Omise --> omisepayment_credit_debit_cards_
Vorkasse --> Banküberweisung
Cash on Delivery (COD) --> Cash on Delivery (COD)
If you can't find your correct technical payment gateway value then reach out to us.