I can't speak for the Open Road, but my 2019 Red 340 did not have a battery maintainer on it when I bought it (new from dealer). In Red Bay when I mentioned it the person writing up my warranty list told me they started putting them on Red's after my model year (2019). So, while I was there they installed one for free. I'm not sure how factual this is regarding Red's, but this is what he told me.
Tommy & Franci - Houston (Clear Lake), TX
2019 Allegro Red 340 33AL
2020 Jeep GC Limited-Blue Ox Avail-M&G Braking
Part Timers-Looking Fwd to being Anytimers