I've never seen a nonstop offered to me in the app or on the web if I am flying a one-stop. I have called and gotten an SDC to a nonstop when there was the potential for being stranded overnight in a city where AS only had a daily flight when connecting from a partner award: DUS-ORD-MCI(AA)-SEA(AS) became DUS-ORD(AA)-SEA(AS), but that involved CS reps getting clearance from supervisors.
I'm wondering if you have pmVX phone reps here...