Hotstart is simulated. As MS chose not to be open for external component management (like the engine) the PC6 as all other addons coming have to rely on the MS model.
So yes, unfortunately it is possible to throw the power lever forward with no limitations.
Within these boundaries it’s modeled to perform by the numbers in regards to fuel consumption and performance.
That Milviz can do better if you would let them can be seen in the P3D version, which is pretty spot on, but uses an external engine simulation as most others do as well in this sim (A2A, PMDG, Leonardo).
Re the power settings, RPM is set at 2000 for all phases of flight, except if you want to delay the beta entry.