I have your exact same setup (2021 X17z) and was curious about the same when I purchased it. I ended up buying this suitcase style solar panel with a built-in controller off Amazon. After some research this brand Renogy seemed to be the best purchase for the money.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I went with the suitcase style so that I can maneuver it towards the sun incase I'm parked under shade. I can even move it throughout the day to keep it angled straight at the sun. It's been great!
That's literally all you need to buy unless you want some extra length to move the panel around. I bought this:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
As long as you have full sun, it's enough to keep you charged to be able to use lights, fans, etc at night while boondocking. This will not power the outlets though, those will only work while connected to shore power.
I couldn't recommend the panel enough though, it has been awesome!