This ^^^It is enabled all the time. There is an eco light on the instrument cluster you can turn that on in the settings in the radio
Range Technologies may not make one since its user defeatable, unlike GM where afm turns on in manual mode once in high gear. The latest one they have for Dodge is 2011 Trucks, working on older stuff, now newer. GM stuff they have 2019 stuff available, or coming soon.I run in gear limit 8 always. Its second nature now. When a disabler comes out I will own it.