What about changing the character’s weight?
Maybe they fumbled basic physics implementation on the model.
Technically you would need to change the World gravity scale to get a different falling speed then the default.
The default should be physically accurate at 9.8m/s or whatever it’s supposed to be IF the gravity of the world is that of earth.
which leads to a better question. why would you want to change the falling speed in the first place if you aren’t changing the world’s constants that govern the speed in the first place?