My 2023 didn’t come with engine cover or a hood cover. I bought both parts on parts.ford.com after entering my vin. The hood cover part was super easy to install, maybe a minute. No tools needed, just clips you buy separate from the cover and pop in.
The engine has 2 bolts sticking out that you just place the cover over and put some nuts on. This part took me a bit longer as I didn’t have the right tools so I had to get the nuts on by finger and then finally tighten. Maybe 5-10 minutes.
Maybe 1 decibel noise difference if even, but that might be from my tire swap. Mostly just felt better (“complete”) with them installed.
I can get the part numbers if needed but just put your vin into parts.ford.com and should be able to find the parts. The parts also have diagrams, some of the nuts and clips you have to buy separately. I think I spent around 320 or something like that.