Basic ideas may help.
The RV builder buys a "stripped chassis" from ford, etc. and that chassis has the basic things that most nay truck would have. Then they build the RV on top! So most certainly the chassis will have had steering but not jacks!
There is a jack hydraulic tank shown just behind the front wheel. NOT involved in steering but it does need an occasional check and topping off the fluid to keep the jacks working right.
The steering is likely to also have a tank/reservoir of some type but more likely out front under the hood. Are you familiar with the brake fluid reservoir? Not to be confused with that but a different one still.
We don't know which chassis you have, Ford or Workhorse, so there will likely be slightly different shapes and locations but I did a search for Ford power steering and got several videos showing the power steering on an F150 pickup that gives some ideas of how to find the power steering and hoses.
Basic idea is that there will be a pump driven by the fan belts. from that pump there will be a rubber hose to the reservoir for fluid! Fluid is likely to just run downhill to the pump, so start with looking high under the hood.
Good chance there is some info on the tank as to whether it is power steering or power brakes! Jacks will be underneath the RV by the wheel.