I've released a plugin where your party's luck influences/increases your enemy drop rates here: https://a-higher-plane.itch.io/luck-influences-enemy-drop-rate-plugin-for-rpg-ma...

This plugin for RPG Maker MV allows your party's luck to affect the drop rate of enemies. This is based on the party's total luck or average luck. You can choose to include or not include reserved party members. The first number in the parameters is what your luck divides by, which adds to the chance of acquiring those items.