Glad to hear it's working well for you. Just for anyone else reading this, what I do about this is just to jostle my hardware throttle, even the smallest amount, after touchdown if I have any question of the virtual throttle position.
To answer your question, yes, it's possible in many PT6A powered aircraft, however, it is also prohibited by the operating limitations of almost all these aircraft. The only one that comes to mind where this is not prohibited is the Pilatus Porter. I've seen it done with Caravans in real world skydiving operations, but it is still prohibited by the POH, and the limitation placarded on the panel. The problem is usually overspeeding of the propeller, since beta is the opposite of feather, if that helps you think about it. I make no guarantees of how my aircraft will behave in this configuration, especially with respect to propeller speed, but I can say that they will slow down REALLY fast if you do try it.