Smooth platformer camera extension is missing camera speed actions

smooth platformer camera extension is missing camera speed actions, (in the event editor no in behaviour options). After the game begins I can’t change the speed of the camera(in the event editor), I have actions of the smooth camera extension but not of smooth platform camera extension. Speed camera actions of smooth camera extension doesn’t works while smooth platform camera extension is on.

I have tried to edit the extension to enable these actions but I have not succeeded to make it work. is this possible? anyway it would need to be fixed please, thank you.