The FCC just approved Starlink's application for in-motion use.
While you're at it, if you're a Starlink customer (or plan to be) be sure and let your representatives know about the possible interference from Dish Network's plans for the 12.2GHz spectrum.
Some people have reported they've been able to use their Starlink while traveling down the road after they subscribed to their Roaming option. I haven't tried it yet, although i do have a ladder mount rigid enough to travel with the antenna mounted. I am subscribed to their roaming service and have used it when stoping at rest stops or shopping stops etc.. Next time i'm hitched up i will try it since the router is now somewhat preeminently mounted and plugged into the inverter.