Is there a way to use linear throttle like in betaflight?

I have two ardupilot 436 acro fpv drones now, and both of them have different feels with throttle stick.
When I raise my stick to half, the throttle value in my osd is only about 20%, and this really affects my muscle memory as in bf the throttle is linear.
Is this related to thrust expo or something else? I have tried changing expo to 0 and 1 and I don’t feel the difference.