Regular users of P2P payment platforms will receive a 1099-K which must be reported to the IRS. It is important to note, even if the P2P does not issue the 1099-K you must still report for income tax purposes all transactions for goods and services over the $600 threshold as income.

Apple Pay itself is a digital wallet, not a payment processor, so it does not report your transactions to the IRS. However, the linked services you use within it might. For example, if you use Apple Cash (operated by Green Dot Bank) to receive business payments, or if you use a third-party app like Venmo or PayPal via Apple Pay for "Goods and Services," those entities are required to issue a Form 1099-K if you cross a specific gross payment threshold. As of the current tax laws, personal transfers (sending a friend money for dinner) are not taxable or reportable. But for business owners, while Apple isn't "tattling," the underlying financial institutions are legally bound to report income. You are still responsible for self-reporting any business income earned through these platforms, regardless of whether a form is generated.