Lot of info here, I apologize if mentioned prior:
I have a 2020 FX4 + HD Tow Package. My GVWR is 7,450 LBs and max occupants and cargo is 1,746 LBs. I guess this translates to my truck weighing 5,704 LBs which is A LOT heavier than I thought it would be as those are the only two options checked...
One takeaway from this is the exact same same year/optioned MAX is exactly 270 lbs heavier (of which, maybe 40 +/- LBs of that is from wet extra fuel weight and larger gas tank). Yet can carry 159 more pounds of payload than me.
Don't know if the OP has been answered, but I DO have the reverse knob and brake controller.
Also, TTBOMK, it has the same tow capacity of any others, with a tongue weight of 600 LBs (900 with WDH) and maximum tow weight of 9,000 LBS (the full blown transfer case 4x4 subtracts 200 lbs of total tow capacity). The only thing that may seem unusual, is b/c the FX4 comes standard with 3.73s the HD Tow Pack option does not "add" them.
Also, the HD Tow Pack adds more frontal area (55 SF to 60 SF).
The below is helpful:
https://www.ford.com/cmslibs/conten...pdf/guides/20Towing_Ford_Expedition_Oct15.pdf