COD is the exception, not the rule
In Poland, BLIK is the go-to online payment, Przelewy24 is the bank-transfer standard and cards are common. COD is available only for orders shipped within Poland and is a smaller share of payments. A seller who copies a COD playbook from Algeria or Pakistan will find different buyers.
That does not make COD useless. Cold traffic to an unknown store hesitates to pay first, and a pobranie option can lift conversions for products where trust is the barrier.