On no aircraft do you directly control prop pitch, you set the propeller RPM with the prop lever and the constant speed unit will adjust the propeller pitch to maintain that RPM. There is no difference in that respect to any other MSFS aircraft with a constant pitch propeller?
The turboprop engine model in MSFS is laughable in its current state, on the Kingair and TBM the ITT shoots up and becomes as hot as the surface of the sun, fusing hydrogen atoms into helium when feathering. Weirdly the Ng does not go down when feathering, but the prop speed does go down so there isn’t a gearbox simulated between the compressor and the power section? It seems there is a disconnect somewhere…