Please be carefull in comparing engine and aircraft certification material. They serve different purposes and might be inconsistent if taken out of their context.
At engine level, uncontained failure is typically associated with casing performation. The engine certification cannot assess installation effects. On this basis, SWA is not an uncontained engine failure, from the strict engine point of view.
At aircraft level, not so. EASA AMC 20-128A and FAA AC 20-128A, which are identical, provide an engine failure model, based upon historical data, which includes fan blade fragments with a spread angle reaching up to 15° of the nominal rotation plan (§9.e). Typically, this addresses fan blades released forward of the fan containment system, exactly as in the case of SWA1380. The SWA1380 event is an uncontained failure engine failure. .
And bearing in mind that from a safety point of view, what really matters is the aircraft and not the engine, it is fair to conclude we can consider the event as uncontained engine failure.