Joystick support via SDL2 library?

Quick question, I’m using this plugin to add DualShock 4 and DualSense support, and I’m wondering how I would go about adjusting the deadzones and such for the triggers and analog sticks.
It seems like they go beyond -1 and 1, while being still doesn’t produce 0.

EDIT:

Here’s a video showing what I mean. Something is really off about the analog stick movement and triggers.

https://streamable.com/3fklql