Immersive Cleaning

Load order, if using Immersive Cleaning and PRP:

Unofficial Fallout 4 Patch.esp
PPF.esm
ImmersiveCleaning.esp
ScrapZapper2.esp
...
<Other mods>
...
PRP.esp
PRP_IC.esp

Damn Apocalypse Loot

The module needs to come after Scrap Zapper 2 and Damn Apocalypse:

DamnApocalypse_CORE.esm
DamnApocalypse_Loot.esp
ScrapZapper2.esp
ScrapZapper2_DamnApocalypse.esp

Immersive Scrapping

Immersive Scrapping should come after Scrap Zapper 2 and the module should come after both:

ScrapZapper2.esp
ImmersiveScrapping_SeasonPass.esp
ScrapZapper2_ImmersiveScrapping.esp

Random Junk Redux

The module needs to come after Scrap Zapper 2 and Random Junk Redux:

GKX Random Junk BOS.esp
ScrapZapper2.esp
ScrapZapper2_RandomJunkRedux.esp

The Rebuild Collection - AIO

Load order, if using The Rebuild Collection - AIO and PRP:

Unofficial Fallout 4 Patch.esp
PPF.esm
Rebuild_ShareResources.esm
ScrapZapper2.esp
ScrapZapper2_RebuildAIO.esp
...
<Other mods>
...
PRP.esp
Rebuild_Settlements_Previs.esp

Note that the use of Unofficial Patch and PRP is optional, but recommneded.