I noticed that when I was looking up something in a 2020 Trike manual, still had the old style ignition switch and knob. Also the old style security fob. For some reason I had thought they replaced all of them with the new system after 2014, but it turns out I was wrong.
I'd be interested in knowing if the old style switch would keep the new infotainment system fired up without interruption as you flip it to accessory mode. There is a very short interrupt when switching from ON to ACC which didn't bother the old style audio systems, but the new system seems to not tolerate any such short interrupt. If it did you could hit the Stop switch and the Trigger switch immediately afterward and everything would keep running. And of course it wouldn't keep the lights on like the OP wants. But this thread is good, it's educating me and I bet some others about the new system.
Jerry