Imperial Archers seem to not load with the bows at all despite their upgrade path saying they have them

im the same way archers and crossbows have the arrows but dont fire

its the dynamic troop armory thing

Yes, I believe that's a part of the Dynamic Troop Equipment System mod, I included it in this collection because it does what the 'Keep What you Kill' mod did and then some.

Making sure you have enough arrows at the right tier for your units in the army armory should solve this problem.