What is Apple Pay?
Apple Pay is a payments (both mobile payment and digital wallet) service launched by Apple Inc. that lets apple users / customers make payments using an iPhone, Apple Watch, iPad or Mac.
Pre-requisites for integrating Apple Pay on your mobile app:
Here's the list of payment gateways that support Apple Pay:
First Data Payeezy
You also need to have a valid SSL certification.
List of countries that support Apple Pay:
Isle of Man
You can also check this article for the latest updated list
If you meet both the above pre-requisites, please create a staff account for firstname.lastname@example.org (on your Shopify Admin Panel) and drop a line to the same email or your customer success manager to get Apple Pay integrated for your mobile app.