That’s weird. Works for me both through the embedded browser in Voyager and Safari directly (with adblocker enabled)

That’s how umlauts historically evolved, but nowadays I wouldn‘t say ü short for ue, but its own letter (even though you still can write it as ue if you don’t have it available on your keyboard or whatever)

Is there a reason to keep this structure other than „we’ve always been doing it like that“/backwards compatibility?

The GDPR is a regulation (that’s what the R stands for), not a directive. Directives must be transposed into national law by the member states, while regulations apply directly