You're right its prob more of a general warning, but they do say this about the roaming...
"Additionally, the “Mobile – Regional” plans are intended for temporary travel and transit, not for permanent use in a location. If you have been using a "Mobile - Regional" plan for more than two months outside of the country in which you ordered Starlink, you must either see
Support FAQs to change your account country or return to the country in which your service was ordered. Otherwise, your service will be restricted."
That last piece is vague. How long must you return to the country in which it was ordered?