Found this hanging a bit on the rear right corner. Tucked it back behind the bumper cover, but curious what it is.

 

Fuel overfill hose or water..

 

Ditto

 

Agree, but I don't think it should be hanging loose like that though.

If you watch the rear bumper removal video from PowerfulUK and scroll forward to about 19:09, you should see what looks like that hose in the background, seemingly attached to a black plastic base with some sort of metal clip:

You might be able to poke your head behind the bumper, and/or stick your hand back there and see if you are able to reconnect the hose by feel, as seen in the video.

 

This is great @umbertob ! Thanks! I will get under the car tomorrow and see if it got off the clip.

 

Look at your gas cap and see if there is a drain hole underneath of it. I believe I have a hole under mine which sort of looks like someone just jammed a pen in there to make the hole. Needless to say, water still sits there like a puddle and it doesn't drain very well.