Thank you for testing this!
You’re correct. Since there isn’t a way to “verify” that the payment was sent automatically, the switch “I confirm payment” is there and indicates that the user agrees that they sent payment.
From there, the store owner will see the new order in their orders dashboard and can verify that they received the money from either PayPal or CashApp.
Would different wording or flow make this easier or more clear as a user? Video below.