Saw a few articles like this:

https://www.motortrend.com/news/2021...inter-weather/

As detailed on the F150gen14.com forum, a user in the lower half of Texas says they lost power for three days; while neighbors set up a conventional backup generator to keep their critical home functions rolling, this forum poster busted out their 2021 Ford F-150 Platinum PowerBoost Hybrid. Using the onboard power-supply setup—which is powered by both the batteries and the engine—as a generator, the owner ran extension cords from the pickup to their kitchen to power a few lights, a toaster oven, a space heater, and the fridge.

It sounds as though the F-150 went above and beyond the call of basic duty, also powering a 75-inch TV, a coffee maker, and a freezer for "10-12 hours per day." Keep in mind, temperatures in the area were hovering in the teens during most of this time. The Ford owner says the F-150's hybrid powertrain only chewed through a few gallons of gasoline during this period and noted how the engine would come on and turn off periodically to keep the batteries onboard juiced up. The setup proved quieter than the neighbors' traditional portable generator, according to the user, and thanks to the truck's much larger fuel tank, didn't need to be refueled at least twice per day.
Not sure that what they were thinking about when they designed them, but if it works.