Weight of HITCH (receiver/ball shank) is counted as part of 'tow vehicle payload. Vehicle carries that HITCH weight
Tongue weight is the amount of trailer weight NOT being carried by trailer axles
Items on the front A frame add to the tongue weight (battery/propane/trailer jack)
Tongue Weight: The downward force or weight that the tongue of the trailer applies to the hitch of the tow vehicle.
Note that tongue weight is considered part of the vehicle’s GVW, however the entire weight of the trailer is not.