Does P-Factor increase with thrust? I was trying flightgear simulator since I am not a pilot (but have completed ground school) and one thing I have noticed is that the P-Factor increases with thrust applied whether taking off or in cruise flight.

Is this realistic? Does P-Factor vary based on thrust?
Yes, it should. In the end, p-factor is just a funny word for the out-of-center shift of the thrust vector, and if the vector is larger, the effect should be equally larger.