Cant explain what you encountered but would recommend alignment soon after the new tires are installed.

2019 Edge ST with 105k miles   Recently the check engine light came on and my scanner revealed the two error codes.    Since the purge valve solenoid is right on top of the engine, I thought I would replace this first. Dorman 994-073 Vapor Canister Purge Valve   I tried clearing the codes but my cheap scanner won't allow me to do that, so I was hoping the codes would clear themselves, assuming the purge valve is now working.    I have also cleaned and inspected the fuel filler area, but it appeared very clean and tight.    I would also like to inspect/replace the charcoal canister but I cannot find it's location. If anyone could tell me, I would be most appreciative.    Thank You!!   RPGR90s

2019 Edge ST with 105k miles. Original owner.   I installed a set of GoodYear Assurance A/S tires about 50k miles ago and they have been fine. Normal wear and they're almost due for replacement.    About a year ago I noticed the car wanting to pull slightly to the right and they steering wheel being off-center to the left.    Tire pressure normal (35psi) at all four corners Alignment checked Then I decided to just swap the two front tires from side to side and the result was that the car now track normally and the steering wheel is centered again.    My theory is that the belts on the right front tire were wearing differently and causing the tire to drift to the right. My basis is that my father was an engineer at Uniroyal Tire for 40 years and he often talked about what happens inside a tire, even when the tread appears fine.    So I'll be replacing the tires this Friday with a new set.    Just wanted to pass this along in case anyone else is having a similar issue.    RPGR90s

My brother helped me do this just this past sunday, 13th. We removed and replaced the (rear drive unit clutch kit) Part # CV6Z-4A232A.  Took us about 2 hrs. Mine was shuttering and sort of not releasing going around corners under light throttle, the part cost $638.00 from Lakeland Ford of FL. Pretty straight forward R&R, only thing is you have to >pair< the new unit with Forscan, with a new 4 digit code, that took almost as long as the install. Very happy with the results of repair, (bluey) is as good as new now! This was with 145,xxx on the odo, and its a 2014 3.5 litre.

2019+ got AWD disconnect is one difference, even it that doesn't mean the change is in the PTU.

I did a quick look for the recommended PTU fluid for a 2010 Ford Edge.   Indeed, it states 75W140 so I would not deviate from that either.   My guess is that the main difference between the 2010 PTU and the 2020 ( maybe 2019+ ) is that the newer PTUs have tighter tolerances, hence the factory calls for a thinner gear oil. Other than that, not sure why they would change gear oil weights 

I would not deviate from the oil weight listed in the owner's manual - is that what's being suggested? 

Mine calls for 75-85. Also I noticed the PTU on the ST is called a high torque PTUSpecifications - Power Transfer Unit - 2.7L EcoBoost - 2022-2024 Edge.pdfSpecifications - Power Transfer Unit - 2.7L EcoBoost - 2022-2024 Edge.pdfSpecifications - Power Transfer Unit - 2.7L EcoBoost - 2022-2024 Edge.pdf, although they look the same. 

Have a local mechanic (was a Ford technician, worked for couple of dealers before going out on his own.)   Had him rotate tires, change the engine oil, transmission fluid, PTU oil, and power  steering fluid. Will change brake fluid next year, and new water pump (etc.) around 175,000 miles. (He drops engine and changes everything while its out.)   Asked  for a good look over and told him to just go ahead and fix it, no need to call unless going over a grand. He said he checked everything and couldn't find anything to fix. Really appreciate an honest, qualified mechanic. 

I guess the 2020 units are more " sensitive ".  🙂