Ok this is my final understanding:
In a turbo prop;
N1 spool creates exhaust gas which spins the other power turbine N2 via windmill effect, power turbine connected to gearbox to reduce 50,000 RPM to 1700 RPM, gearbox turns prop shaft which is directly connected to prop itself.
Throttle controls N1 gas generator by modulating fuel flow
Prop control is for RPM, governors will maintain this RPM AT ALL COSTS!!!!!!!!!!!!! So if we increase torque the governers will say NO, they will maintain RPM at all costs, as torque is increased or decreased the governors will adjust blade angle to maintain RPM, the blade angle change is what produces our thrust! not the prop RPM!
Torque is primary parameter in PT6A-67A for Beechcraft Starship 2000 (BE-2000)
Change torque via gas generator via throttle levers, blade angles change and THIS is what produces thrust, RPM is always held constant by the governors and the RPM is ONLY changed by the prop controls, prop control ONLY changes target RPM nothing else, we have no direct control over blade angle in alpha range (forward thrust range)