Version 2021.6.15 made Kill All Dummies runs slower by introducing the new meeting screen, and version 2021.6.30 made All Task runs slower by introducing a new task. For these reasons, it might be better for you to use an outdated version of the game to perform your runs. You'll be able to find older versions or ways to downgrade in this guide.

Steam

Android

https://among-us.en.uptodown.com/android/versions