Answer
Yes — configure an SMS Sender under IFS Connect Configurations, using a gateway account from a supported SMS gateway provider (Clickatell is a commonly used example). The standard documented pattern for this is built around the 'Configure SMS Send Functionality for Escalation Handler' setup, which establishes the SMS Sender and gateway connectivity — the same underlying SMS Sender configuration can then be reused for other event-driven SMS notifications beyond just Escalation Handler, such as notifying a customer via a custom event when a payment is approved.