Does Apple Pay support subscriptions?

Subscriptions can be enabled for Apple Pay transactions.
Note: Subscriptions can only be performed using our Subscription Engine, which automatically processes recurring payments on your behalf. Trust Payments does not support the manual processing of recurring payments through our API using your own scheduling engine.
There are two methods that can be used to do this:

Schedule subscription with immediate payment
Your app will need to process a combined AUTH, SUBSCRIPTION request.
Click here to more about how this works.
Documentation:

Schedule subscription with a free trial
Your app will need to process a combined ACCOUNTCHECK, SUBSCRIPTION request.
Click here to more about how this works.
Documentation: