What are these markings ? (2017 ram)

A56 said
From the Net

5.7 HEMI Misfires/Spark Plugs Longevity

OEM spark plugs don't last that long. They should be changed every 30,000 to 40,000 miles on Chrysler's 5.7 Hemi. And it can be a nightmare dealing with an ignition-related misfire, as the Hemi V8s have two spark plugs per cylinder. Plus, it will double the maintenance work, and a pack of 16 modern spark plugs isn't cheap.

I came across that information too, but it doesnt seem to take into account changes by year

According to my manual, the interval for plugs is 100K miles

I looked at all the coil packs, and they all have a stripe but one of them had a clearly different mark on it

From the Net​

5.7 HEMI Misfires/Spark Plugs Longevity​

From the Net

5.7 HEMI Misfires/Spark Plugs Longevity