PassKit Accept Apple Pay payments for physical goods, real-world services, donations, and eligible recurring payments, and add passes to the user's Wallet. Covers payment buttons, payment requests, authorization, Wallet passes, and merchant configuration. Targets Swift 6.3 / iOS 26+. For advanced Apple Pay flows, one can set only one optional advanced request type: recurring, automatic reload, deferred, Apple Pay Later availability, or multi-token contexts. Use separate payment requests when a checkout needs more than one of those modes. Contents - Setup - Displaying the Apple Pay Button - Cr…