I’ve never flat towed, but there were lots of reports with the 5G Rangers of transmissions being chewed to hamburger when the battery went dead during towing. Consensus in the 5G forum seems to be that a charging cable is good insurance. Not sure if the 6G would have the same issues, but seems...
i tow a Micro Minnie 2108DS which looks like your top picture. I only have the 2.3 and it does just fine towing, the ride feels stable (a lot more stable than my 2019 Ranger with the same trailer) and plenty of power even in the mountains. I’m sure the 2.7 will be that much better. The fuel...