for whatever reason whenever looting is on a weapon in my modpack, it prevents the effect from ancient knowledge from working. I have tested with a fresh pack that only has apotheosis and its dependencies and ancient knowledge worked fine. i even added apothic attributes and better than mending since they were the only mods in the main modpack that i thought might affect experience drops and ancient knowledge still worked. it is quite likely this isnt caused by apotheosis but i couldnt find any other mods that affect experience drops in the main modpack so putting here. i have included the modlist. If anyone knows any of the other mods that could be causing this issue lmk and ill move this to that mods issue tracker.

AdditionalBanners-Forge-1.20.1-14.0.4.jar

alexscaves-1.1.4.jar
alexsmobs-1.22.8.jar
amendments-1.20-1.2.8.jar
Apotheosis-1.20.1-7.4.0.jar
ApothicAttributes-1.20.1-1.3.6.jar
appleskin-forge-mc1.20.1-2.5.1.jar
ArcaneLanterns-v8.0.0-1.20.1-Forge.jar
architectury-9.2.14-forge.jar
ArmorStatues-v8.0.6-1.20.1-Forge.jar
artifacts-forge-9.5.11.jar
athena-forge-1.20.1-3.1.2.jar
BagOfHolding-v8.0.2-1.20.1-Forge.jar
balm-forge-1.20.1-7.3.6-all.jar
BarteringStation-v8.0.0-1.20.1-Forge.jar
bedspreads-forge-6.2.0+1.20.1.jar
beekeeperhut-forge-mc1.20.1-2.0.1.jar
BetterThanMending-1.7.2.jar
BetterTridents-v8.0.1-1.20.1-Forge.jar
blastingraw-1.20.1-2-forge.jar
BlockRunner-v8.0.4-1.20.1-Forge.jar
Bookshelf-Forge-1.20.1-20.2.13.jar
BorderlessWindow-1.20-1.6.0.jar
Bountiful-6.0.3+1.20.1-forge.jar
BuildingWands-mc1.20.1-2.6.9-release.jar
caelus-forge-3.2.0+1.20.1.jar
chalk-1.20.1-1.6.4.jar
charmofundying-forge-6.5.0+1.20.1.jar
chat_heads-0.12.9-forge-1.20.jar
Chipped-forge-1.20.1-3.0.6.jar
citadel-2.5.6-1.20.1.jar
cloth-config-11.1.118-forge.jar
Clumps-forge-1.20.1-12.0.0.4.jar.disabled
collective-1.20.1-7.80.jar
comforts-forge-6.4.0+1.20.1.jar
Companion-1.20.1-forge-5.0.1.jar
configured-forge-1.20.1-2.2.3.jar
Controlling-forge-1.20.1-12.0.2.jar
corpse-forge-1.20.1-1.0.12.jar
cosmeticarmorreworked-1.20.1-v1a.jar
create-1.20.1-0.5.1.f.jar
createaddition-1.20.1-1.2.4d.jar
CreateCasing-1.20.1-1.6.1-fix1.jar
create_salt 1.20.1-1.1.0.jar
cristellib-1.1.5-forge.jar
curios-forge-5.9.1+1.20.1.jar
curious_armor_stands-1.20-5.1.0.jar
customizableelytra-forge-2.1.2+1.20.jar
CutThrough-v8.0.2-1.20.1-Forge.jar
DarkUtilities-Forge-1.20.1-17.0.3.jar
dcintegration-forge-3.0.7.1-1.20.1.jar
deathbackup-1.20.1-3.4.jar
DiagonalFences-v8.1.4-1.20.1-Forge.jar
DiagonalWalls-v8.0.3-1.20.1-Forge.jar
DiagonalWindows-v8.1.4-1.20.1-Forge.jar
domum_ornamentum-1.20.1-1.0.186-RELEASE-universal.jar
duckling-3.0.0-forge.jar
dummmmmmy-1.20-1.8.17b.jar
dynamiclights-1.20.1.2.jar
dynamiclightsreforged-1.20.1_v1.6.0.jar
easy-piglins-forge-1.20.1-1.0.9.jar
easy-villagers-forge-1.20.1-1.1.15.jar
EasyAnvils-v8.0.2-1.20.1-Forge.jar
EasyMagic-v8.0.1-1.20.1-Forge.jar
EasyShulkerBoxes-v8.0.2-1.20.1-Forge.jar
easy_mob_farm_1.20.1-7.1.0.jar
EchoChest-v8.0.0-1.20.1-Forge.jar
elytraslot-forge-6.4.3+1.20.1.jar
embeddium-0.3.28+mc1.20.1.jar
embeddiumplus-1.20.1-v1.2.13.jar
EnchantingInfuser-v8.0.3-1.20.1-Forge.jar
EnchantmentDescriptions-Forge-1.20.1-17.0.16.jar
EnderZoology-v8.0.2-1.20.1-Forge.jar
ExplorersCompass-1.20.1-1.3.3-forge.jar
exposure-1.20.1-1.7.5-forge.jar
FarmersDelight-1.20.1-1.2.4.jar
Female-Gender-Mod-forge-1.20.1-3.0.1.jar
ferritecore-6.0.1-forge.jar
files_and_folders.txt
flowerymooblooms-forge-mc1.20.1-2.0.2.jar
framework-forge-1.20.1-0.7.6.jar
friendsandfoes-forge-mc1.20.1-2.0.15.jar
ftb-chunks-forge-2001.3.1.jar
ftb-library-forge-2001.2.4.jar
ftb-teams-forge-2001.3.0.jar
ftb-ultimine-forge-2001.1.5.jar
geckolib-forge-1.20.1-4.4.7.jar
GeckoLibOculusCompat-Forge-1.0.1.jar
geode_plus-forge-1.2.5-1.20.1.jar
giacomos_map_merging-1.20.1-1.3.6.jar
globalxp-forge-1.20.1-1.11.jar
goblintraders-forge-1.20.1-1.9.3.jar
guardvillagers-1.20.1-1.6.6.jar
handcrafted-forge-1.20.1-3.0.6.jar
HorseExpert-v8.1.1-1.20.1-Forge.jar
Iceberg-1.20.1-forge-1.1.21.jar
idas_forge-1.10.1+1.20.1.jar
IllagerInvasion-v8.0.5-1.20.1-Forge.jar
integrated_api-1.5.1+1.20.1-forge.jar
integrated_stronghold-1.1.1+1.20.1-forge.jar
integrated_villages-1.0.1+1.20.1-forge.jar
ItemBorders-1.20.1-forge-1.2.1.jar
Jade-1.20.1-forge-11.9.2.jar
JadeAddons-1.20.1-forge-5.2.2.jar
jagmkiwis-1.20.1-1.1.1.jar
jeed-1.20-2.2.2.jar
jei-1.20.1-forge-15.8.2.25.jar
JRFTL-1.20.1-1.6.0.jar
JustEnoughAdvancements-1.20.1-5.0.1.jar
JustEnoughProfessions-forge-1.20.1-3.0.1.jar
JustEnoughResources-1.20.1-1.4.0.247.jar
Kambrik-6.1.1+1.20.1-forge.jar
kotlinforforge-4.11.0-all.jar
LeavesBeGone-v8.0.0-1.20.1-Forge.jar
letsdo-API-forge-1.2.15-forge.jar
letsdo-bakery-forge-1.1.15.jar
letsdo-beachparty-forge-1.1.5.jar
letsdo-bloomingnature-forge-1.0.7.jar
letsdo-brewery-forge-1.1.9.jar
letsdo-candlelight-forge-1.2.13.jar
letsdo-herbalbrews-forge-1.0.8.jar
letsdo-meadow-forge-1.3.19.jar
letsdo-nethervinery-forge-1.2.14.jar
letsdo-vinery-forge-1.4.27.jar
LibX-1.20.1-5.0.12.jar
light-overlay-8.0.0-forge.jar
lootr-forge-1.20-0.7.34.86.jar
material_elements_1.20.1-7.1.1.jar
mavapi-1.1.4-mc1.20.1.jar
mavm-1.2.6-mc1.20.1.jar
MetalBundles-v8.0.2-1.20.1-Forge.jar
modernfix-forge-5.19.0+mc1.20.1.jar
modonomicon-1.20.1-forge-1.74.0.jar
monobank-1.20.1-1.1.4.jar
moonlight-1.20-2.12.9-forge.jar
MouseTweaks-forge-mc1.20.1-2.25.1.jar
NaturesCompass-1.20.1-1.11.2-forge.jar
Neruina-2.1.1-forge+1.20.1.jar
nethersdelight-1.20.1-4.0.jar
occultism-1.20.1-1.132.2.jar
oceansdelight-1.0.2-1.20.jar
oculus-flywheel-compat-forge1.20.1+1.1.1.jar
oculus-mc1.20.1-1.7.0.jar
pamhc2crops-1.20-1.0.3.jar
pamhc2foodcore-1.20.4-1.0.5.jar
pamhc2foodextended-1.20.4-1.0.1.jar
pamhc2trees-1.20-1.0.2.jar
Patchouli-1.20.1-84-FORGE.jar
PickUpNotifier-v8.0.0-1.20.1-Forge.jar
PigPen-Forge-1.20.1-15.0.2.jar
Placebo-1.20.1-8.6.2.jar
polymorph-forge-0.49.5+1.20.1.jar
potionbundles-1.20-1.8.jar
Prism-1.20.1-forge-1.0.5.jar
PuzzlesLib-v8.1.21-1.20.1-Forge.jar
Quark-4.0-460.jar
QuarkOddities-1.20.1.jar
quark_delight_1.0.0_forge_1.20.1.jar
repurposed_structures-7.1.15+1.20.1-forge.jar
resourcefulconfig-forge-1.20.1-2.1.2.jar
resourcefullib-forge-1.20.1-2.1.28.jar
rubidium-extra-0.5.4.3+mc1.20.1-build.121.jar
Runelic-Forge-1.20.1-18.0.2.jar
salt-1.20.1-1.2.6.jar
Searchables-forge-1.20.1-1.0.3.jar
SkyVillages-1.0.4-1.19.2-1.20.1-forge-release.jar
SmartBrainLib-forge-1.20.1-1.14.2.jar
sootychimneys-1.20.1-1.2.1.jar
sophisticatedbackpacks-1.20.1-3.20.5.1044.jar
sophisticatedcore-1.20.1-0.6.22.611.jar
sophisticatedstorage-1.20.1-0.10.25.804.jar
spark-1.10.53-forge.jar
Stoneworks-v8.0.0-1.20.1-Forge.jar
supplementaries-1.20-2.8.17.jar
TerraBlender-forge-1.20.1-3.0.1.7.jar
TinyCoal-forge-1.20.1-1.1.5.jar
TinySkeletons-v8.0.1-1.20.1-Forge.jar
TradingPost-v8.0.2-1.20.1-Forge.jar
trimeffects-forge-1.20.X-1.3.1.jar
UniversalBoneMeal-v8.0.1-1.20.1-Forge.jar
UniversalEnchants-v8.0.0-1.20.1-Forge.jar
unlockschematics-1.20.1-1.0.1.jar
VisualWorkbench-v8.0.0-1.20.1-Forge.jar
wares-1.20.1-1.2.8.jar
waystones-forge-1.20-14.1.4.jar
XaerosWorldMap_1.38.8_Forge_1.20.jar
Xaeros_Minimap_24.2.0_Forge_1.20.jar
xaeros_waystones_compability-1.0.jar
Zeta-1.0-24.jar
[1.20.1]MoreCraftingTables-5.1.3.jar

Do a binary search to find the culprit of this issue.

Disable half of the mods in the modpack
If issue is resolved, enable half of the mods back
If issue is not resolved, disable half of the mods again
Rinse and repeat until you find the culprit(s)