This is the main setting to flip to enable the reverse guidance lights.
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Once you flip this setting to "Yes", then you will need to enable the menu option.
To find this setting, it is easiest to search for "Rear Cargo Guidance Lights Enable/Disable CSM Present" and set it to "Enable."
After you flip the setting for the menu, you will need to shut off the key, open the door, and let the truck completely power down (wait till the dash goes completely dark.
I wait about 3-5 min. Then, when you restart your truck, the reverse lights should come on with the cargo lights. When you go to your settings > lights, you should see a new menu option at the bottom to turn off the reverse guidance lights from coming on with the cargo lights.
Let me know how it goes. Happy to help if you still have no joy!