Here's an ***UPDATE***
I figured out the Dealers will never be able to diagnose the code issues I had because all three I went to, were unable to duplicate the fuel flow problems I had because I was towing a 12K# Tiny Home which is like pulling a Parachute down the highway. Another friend of mine who was having the same issues when towing her horse trailer from Northwestern climates, was also having similar issues... wel she stopped by the shop and we have since fixed the problem with her 2020 RAM 3500 Longhorn HO.
The fuel systems on our trucks are so sensitive to fuel impurities, such that the fuel has to be constantly "polished" to make sure there is no debris, no dirt and when the High Pressure Pump pulls harder than the rear filter can offer a fresh stream of clean fuel causing air bubbles, it becomes an issue.
The simple remedy that offers a bonus is a Fuel Polishing System. I have a very similar system on our 52' Sunseeker Predator Yacht that cleans the fuel I buy in remote places like the Bahamas. A simple series of filters and a pump make sure the fuel is constantly recirculated through additional filters before going both to the OEM Truck tank and back into the Aux Tank. Watch the video below for a full explanation of the RDS Tank Install utilizing the Aux Switches to control the system.