There should be. This seems like an open and shut case of disregarding sanctions which is a huge no-no. I believe George Bluth refered to it as “light treason”. Gets extra juicy since it’s being used by the military of an enemy of the state. Wonder how much of US weaponry or aid to Ukraine has suffered from an attack using Starlink.
“We didn’t realise.” would not cut it. That’s direct opposition to the intent of the US. That’s going against your country.