* Fix - Fatal error caused when the Action Scheduler API method `as_has_scheduled_action` is used for migrating payment tokens.
* Fix - Missing payment token and customer ID in subscription orders when HPOS is enabled.
* Fix - Issue with changing payment method for subscriptions when HPOS is enabled.
* Fix - Fatal error when Digital Wallet is enabled and product quantity is 0 or price field is unset.
* Add - Support for submitting custom required fields data via Digital Wallets based checkout.
