I have never heard of an RV manufacturer supplying anything other than the basic AC unit. You can add a hard start capacitor or a soft start kit if you need to run on a marginal generator. Personally, I would get a generator large enough to do the job so that other loads could be powered as well.
I’ve got a Honda 3000 inverter generator it will run 1 ac no problem. I made a heavy duty cord to plug it to the camper with a 50 amp end and a generator 30 amp on the other. But I have used 2 adapters and plugged it it to the 20 amp plug with no problem for a short period of time but I fell better with the cord I made .