The following loot tables in the Bandit Towers do not exist and do not generate loot:

dungeons_arise:chests/desert_city_small
dungeons_arise:chests/desert_city_big
dungeons_arise:chests/desert_city_medium

/give @s chest{BlockEntityTag:{LootTable:"dungeons_arise:desert_city_small"}} will give an empty chest. With Lootr installed, the user is presented with this message:
Unable to fill loot chest in ResourceKey[minecraft:dimension / minecraft:overworld] at class_2338{x=208, y=184, z=240} as the loot table 'dungeons_arise:chests/desert_city_big' couldn't be resolved! Please search the loot table in latest.log to see if there are errors in loading.

There were no issues in loading. Looking at the repo I don't see the named loot tables in the resource pack either.

Same on:
dungeons_arise:chests/shiraz_palace/shiraz_palace_supply

I can confirm the "dungeons_arise:chests/shiraz_palace/shiraz_palace_supply" is still missing as of today, in Dark RPG (Fabric) modpack, running When Dungeons Arise version of 2.1.56.1