They were easy to put on. Just pop out the plastic rivets (and a 7/32 bolt screw on the bottom of the rear bumper) with a screwdriver or a body tool, put them in place, and pop the rivets back in.
Pro tip: Knock out as much dirt as you can before you put them on, and washing the rivets will help them go back in easier. Turn the front wheels for easier access, and to pop them in with a hammer. They come with screws that don't fit and aren't needed.
This was a $200.00 option if you ordered them on the car from Ford. I spent about $48.00. They look OEM, though I'm not sure they are.
Got them here: New OEM Sport Splash Guards Mud Guards Mud Flaps For 2018-2021 Ford ECOSPORT SUV | eBay
I'm ready for winter! 😊