Welcome to the forum. My 2016 24K with diesel generator doesn’t have the grill connect either. I wouldn’t be surprised if the they used a propane hose for diesel fuel. I would inspect the hoses and make sure they just didn’t label it wrong. I am not sure how diesel fuel will affect the hose if it is propane hose but I would want to know if I was you. They swapped the diesel supply and return hoses on mine so the supply line was at a higher part of the tank. Piped like this my generator would cut off at 3/4 tank instead of at about 1/4 tank.
It wouldn’t be that hard to add an additional line for a portable grill.
I have this on my Amazon wish list but we don’t cook that much so I haven’t pulled the trigger yet.
If you boondock a lot it would let you run off a portable tank as well with the link I provided but there are other options for just running an additional appliance.
What faucet did you go with? I need to change mine again. I changed it once already under warranty but it is leaking again. I am glad I spotted the leak because it just runs down the hose into the cabinet.
Very shotty workmanship in areas. Check your heater ductwork behind the vents for the furnace and refrigerator inside. The holes the ducts ran through were rough and the ducts were showing some wear from rubbing against it. If left alone they would have leaked over time.