Use all the easing functions described in https://easings.net with posed (https://popmotion.io/pose/learn/custom-transitions/).

In posed documentation

transition: {
  ease: [.01, .64, .99, .56]
}

With this module

import {easeInOutCubic} from "posed-easing-cubic-bezier"
transition: {
  ease: easeInOutCubic
}