I've never seen a 2018 model, but on most of the earlier models that I have seen, the fuse panel is part of the converter. The converter is usually in a black plastic unit, flush with the wall. Push in on the panel and it pops open, revealing the fuses.
I hope this helps -- I am not sure that my description is accurate for your model.
And welcome to the club, by the way! Keep asking questions!
2012 Fun Finder X-139 "Boondock Style" (axle-flipped and extra insulation)
2013 Toyota Tacoma Off-Road (semi-beefy tires and components)