Dunno, they’d probably have a hard time suing European instances, but they can’t outright block, as that would be unconstitutional. U.S. states have recently been using lawsuits to get around constitutionality. I.e. Texas also has a “bounty” law, where if you know a woman went out of state to get an abortion, you can report it, and the state will sue them and give you $10,000. I think another state has a similar law for if you see a trans person using a restroom that doesn’t match the genitalia they were born with.