the main mod (Carpet) already has this functionality

https://github.com/gnembon/fabric-carpet/wiki/Current-Available-Settings#lightningkillsdropsfix

https://github.com/fxmorin/carpet-fixes/wiki/Available-Settings#lightningkillsdropsfix

so they overlap
[13:24:30] [main/WARN]: Method overwrite conflict for method_5800 in carpet-fixes.mixins.json:itemFixes.ItemEntity_lightningKillsDropsMixin from mod carpet-fixes, previously written by carpet.mixins.ItemEntityMixin. Skipping method.

I wrote the original rule and asked gnembon to remove it, and he never did

i see, im sorry