How are subscription payments processed (Shop Pay vs. Stripe)?
Subscription payments are processed by the payment provider that your store uses, as Bold Subscriptions does not handle transaction processing. All transactions are handled by the payment gateway that was used to capture the initial subscription purchase.
If you require more details on which payment gateway was used to process a particular subscription order, it would be best to reach out to Shopify's support team, as they have access to view more details on all transactions processed on your store.