I used to regularly tow a 34' travel trailer (total length including the front hitch area) about 8500 pounds with about 850 on the hitch using a 2020 Expedition Limited standard length. I used a weight distribution hitch like the Equalizer. Mine was the Husky brand.
The Expedition was always level with this hitch. We pulled the trailer from Michigan to Myrtle Beach last year. It actually towed reasonably well and I don't think the weight was really an issue. It was the length of the trailer and wind. When it was windy it would get a bit stressful. Today I use a GMC 2500 HD to pull, but I we still have the Expedition and wouldn't hesitate to pull with it if needed.
I presume you have a sway bar. If not, it's easily added.
We tow a ~7000 lb (29') travel trailer with a 2021 Expedition (has HD tow package). When we upgraded to the larger trailer, we switched to a sway CONTROL hitch (from Blue Ox). It actively pushes the trailer back into position behind the truck. It makes the the truck a bit twitchy in a crosswind, as the force to push the trailer back into position gets transferred to the truck. But once I got used to that, we have never had a problem with sway.
To anyone following this thread: I can't stress enough... be sure your weight distributing hitch (WDH) is adjusted correctly. Measure the height of your fenders on level ground without the trailer, then repeat after hitching the (loaded) trailer. If the front fenders are higher, you are likely UNLOADING the front axle, and that can be really bad.
Once you are satisfied with the height of the fenders, take your loaded truck and trailer to a scale and weigh all the axles (front, rear, trailer). Create an account at weighmytruck.com and you should find a public scale near you. Just drive on, open the app and click, and it will send you the results. Next, repeat without the trailer, and compare the results. Also, confirm that the axle weights are within the limits in the manual.