I don't think it is this easy, to classify rear turn signal color by model year. Yesterday, while out and about, I saw GEN 5 RAMs with different-looking rear taillamp assemblies. Curious, when I got home I went to cars.com and started looking at pictures of 2019 RAMs 1500s (first year of GEN 5s). What I discovered is the trim level determined what color the rear turn signal would be, lending credence to wild one's observations. Laramie and up trims that received the LED tail lamps had amber rear turn signals, and lower trims had red rear turn signals as standard equipment.
While on cars.com, I looked at a few 2022 models of the HDs and the same rule seemed to apply, only the LED tail lamps had amber turn signals.
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