To configure item scatter multiplier you can change corresponding value in config folder or use Mod Menu
Requires owo-lib.
How it works?
When player dies game uses dropItem method with throwRandomly = true
which is getting called with this parameter only when player dies. Mod injects into the return value of dropItem and multiplies dropped item speed by multiplier set by player.
Can it break something?
If you have another mod which uses dropItem method with same parameter throwRandomly = true
then speed multiplier will affect the dropped item. So it's virtually safe to use it even in big modpacks