I don't see the issue tbh. Why should the UK (or the EU) care about US laws likenthe first amendment? Nobody is forcing them to offer their website to Europeans

I don't see the issue tbh. Why should the UK (or the EU) care about US laws likenthe first amendment? Nobody is forcing them to offer their website to Europeans, a simple IP block of UK users would likely be enough to avoid any legal risks for your US website example.