Bank transfers (ACH) can take 1-3 business days to process. You'll see it on your bank statement once the payment has processed. You will not see it as a pending transaction beforehand, like you sometimes see with credit card transactions.
Debit card transactions will process almost immediately upon completing your purchase. You will see it as a pending transaction on your debit card statement, and after a couple of days it will change from "pending" to "posted."