Correct, an aircraft can stall at any attitude or airspeed. But during a 1g stall in level flight this isn’t relevant. Issue is that every aircraft I’ve tested transitions into a falling leaf when keeping the stick full back, being able to use up to full aileron input without exceeding the critical angle of attack and inducing wing drop. As long as you keep the stick full back the aircraft does not experience zero g.
A related problem is how Asobo tryed to solve the lack of force feedback and g-loading sitting behind your desk. They have limited the control surface deflection as a factor of airspeed and loadfactor. You have no idea this is actually happening as the in-game yoke or stick mimics your joystick position which is apparently unrelated to the actual control surface deflection.
In my mind your joystick can either directly represent control surface deflection, i.e. the in-game joke mimics your joystick which is directly related to control surface deflection, or your joystick deflection represents a force input and the in-game joke therefore becomes disconnected from the joystick, for example, when pulling the joystick fully back represents x amount of newton force on the controls which at high speed does not correspond to a full up control surface deflection. For some reason they have chosen a weird hybrid of the two methods…
One thing is for sure, they have overdone it to the point it becomes impossible to pull the aircraft into an accelerated stall or for example maintain altitude during a steep turn.
That being said, I uninstalled FS2020 when it got stuck in an update loop again and I didn’t bother to reinstall, so I can’t check if they have improved on this.