When you fly international into any US airport ICE already has, and has processed, the flight manifest. The manifest is not useful (to US or SXM) for much more than identifying information, and for logging entry/departure. It’s only meaningful if the ability to process, store, and report on the information exists.

The Sxmentry system appears to be a nice-to-have wish-list item. It’s a great concept - collect passenger information in advance, allow the passenger to fast-lane with a passport scan and a biometric check, and get them to Baggage Claim in just a few minutes. It’s not working that way.

If it was designed correctly, implemented correctly, and operated/maintained correctly, then it would be a top-tier if not world-class system. Sadly, it is not. It’s mostly an expensive PITA.