No, you are not crazy, the fuel fill door on my 2020 Lariat does not lock either.I just checked again (3rd time) and locking the doors does not lock the fuel door on mine. I'm not crazy my mother had me tested!
That plug will not fit a 2019-2020 Ranger, it's not even listed on the compatibility list.If you're worried about fuel security, Ford does offer a locking fuel plug for the capless fuel system. May not be quite what you folks are looking for since it doesn't lock/unlock automatically with the doors. You have to go through all the effort of turning an actual physical key, but I think folks are strong enough to do this since they've been getting such a workout from their factory-undampened tailgates.
One more side note - - - When you press the indent on the fuel filler door it pops open enough to fully open it. But, the door does not actually latch when closed. The door is held close with a spring and the pop-up is also spring loaded. No real security, at all. Ford saved a bundle on this set up.If you're worried about fuel security . . .
Excellent idea, or a sensor under the rear bumper in which you wave your foot like they have on some of their SUV's to unlock the tailgate latch.I looked through most of this thread and don't think this was mentioned -
Add an intelligent access handle to the tailgate.