I have always heard it is bad to wash engine on a newer car. When the engine in my 2015 Hyundai got a little dusty around 6000 miles (it looked about like your engine), I simply took a Swiffer duster to it and it looked like new again. If it is soiled still, you may can spray something on a cloth like some interior protectant and wipe it down, but not sure I would spray it with a lot of water.
Good luck!
Good luck!