@GoldenHelmet How exactly would you do that? I might be wrong, but wouldn't you have to change the coding of a ravager to do that?
Values like speed and collision box are set in the vanilla behavior pack and for most entities they can be changed by custom behavior packs. You can import behavior packs and apply them to worlds on Windows, iOS, Android, and XBox devices. I have a bug patch pack that includes the the changes to the ravager here. You can use this to test my claim above.
If you are using a raid farm, by placing lava held up by signs over the drop chute you can kill the ravagers