On allmost all motor coaches, And clearly all newer ones, There is a breaker panel somewhere with circuit breakers for 120 volt outlets.
SOME motorhomes have two such boxes/panels, (These usually have an inverter) And in addition the inverter may have breakers on it.
Finally in modern coaches there is at least one GFCI, usually in the bathroom, this powers outlets anywhere you might find water, Kitchen, Patio, Dinette in my coach (As well as the bathrooms).
Of course, There could be a wiring problem too.
Home is where I park it!