that is the problem with centralized social networks, by having someone behind the page, you can go to that person and force them to implement things they did not want. and the way clients and relays work, in theory makes it difficult to apply those laws, a client can not even store anything and only retrieve messages from the relays, even if a client there is someone behind it, it would be of no use since that if one wants to evade that, they could only switch to another client

They could go after any company with operations or a nexus in the United States or who does business with entities that connected to the US. Good luck getting servers or any cloud services.