The fine print for the Starlink RV system says you can use the terminal outside of your registered country for 2 months, after that you'd have to change the registered address to whatever country you're using it in.
The thing is that people with RVs in Europe usually hop around countries a lot. In Australia or the US there is enough space in the country. Almost everyone who has an RV stay 2-3 months per country and then go to another. A group of people who rock up to where I live are old friends together from Sweden who come over in 7 RVs for 2 months via Germany, Denmark, France , Spain, Portugal and Morocco.
