Towing Capacity Question

My BIL tows a 27' trailer with a max gross of about 7000 lbs Expedition EL. It is the prior model but has the 3.5 EB engine. It does okay, certainly has plenty of power, but it's about as big as I'd want to try with an Expedition. Again this is the previous model so I can't say how it compares to a 2019, although I'm pretty sure the max tow rating on it is also 9200 lbs. I don't recall the exact numbers but the payload and max axle ratings on it aren't exactly overwhelming so I'd be sure to check the numbers carefully. Also think about how far you would tow and how you would load the trailer. Most people here assume max GVWR for the trailer weight to be conservative but that might not be how you pack (be aware of creep, though - stuff really tends to accumulate in a camper over time).