I have experience with my 2019 XLT 3.0 with an icon in the instrument cluster that is illuminated with Auto Regen is not enabled. But, an icon that illuminates during regen . . . any chance an image of the section of the (owner's) manual that describes the icon that lights up during regen could be attached to a post?
Here's an image of the section of the owners manual for the 2019 F-150 describing the auto regen off icon.
Here's an image of the section of the owners manual for the 2019 F-150 describing the auto regen off icon.