Ok. outlets are indeed dasiy chained. in most RV's. However there are ways to add additional outlets depending on the intended use.
Low power if you can run a cable (romex) back to the distro point. You can simple connect in there (IF the inverter has breakers it is the distro point, IN my case I have a "Sub Panel".
High power. skip the inverter and run 12ga Romex back to the main breaker box (how I did did it (yes I did it two times).
I use electric space heaters so the added outlets are 15/20 amp (Have a "T" shaped neutral) and one to a circuit breaker. NO aroma of overheated wire/connection since I started using those for the heaters.