Unfortunately, we have no control over the payment methods available, as those are determined by Google Play or Apple.
Accepted payment methods in the Google Play Store:
+ Billing via mobile bill
+ PayPal
+ Credit or debit card
Accepted payment methods in the App Store:
+ PayPal
+ Credit or debit card
Accept payment methods in the Huawei AppGallery:
+ Bank cards
+ Mobile payment
+ HUAWEI Points
Unfortunately, payment by bank transfer is not possible.