Not the Ram but this is the Grand Cherokee's first UOA. Its not going through coolant from what I can tell and its running perfect. Coolant isn't milky and neither is the oil.
Looking to get some opinions on this before I get too upset.....
Don't know if this will give you any insight but I will offer it up.
My 2017 RAM has the same engine as your jeep. Mine is what is often referred to as the PUG or second generation of the Pentastar. I am guessing that yours is also as I see you are using the Jeep recommended 0W-20 oil.
I used 5W-20 pure synthetic initially ( recommended by owners manual ) and have flip flopped a couple of changes with 5W-30 full synthetic. I now have 92,000 miles on the truck with 5,000 miles on the present oil. Just returned from a winter in Florida. Miles are pretty much all highway. Truck is running fine with all engine parameters remaining unchanged. i.e. coolant temp., oil temp and pressure. Mileage remains good @ 24-25 MPG. ( 2 wheel drive with 3.21 gears) Engine is quiet and exhaust appears normal.
I get UOA every other oil changed. UOA averages about every 10,000 miles.
The narrative on my UOA ( also Blackstone) reads almost identical to yours with the exception that my sodium was coming in high and my potassium is always low or normal. Though the sodium was not as excessively over like you potassium is. Wear metals are always good on the low side. My sodium actually started to come down a little on the last UOA. Changing the oil / filter at or just under 5,000 mile intervals combined with the otherwise good UOA has kept me from going into a panic over the high sodium.
I am more suspicious of the o-ring seals where the oil cooler marries to the coolant system in the design of the Pentastar oil cooler than I am of a head gasket. You have the same oil cooler set up on your Pentastar powered jeep. Initially I could not discern any change in coolant level. Recently I have noticed a slightly lower level. I have never added coolant.
I will soon be looking at a coolant change and will most likely investigate the oil cooler & coolant interface at that time.
I do like the device Burla posted. Looks like a worthwhile test to perform. I may give it a go if I can locate the kit.
Good luck. I hope your high potassium turns out to be a result of something not too consequential.