How do I disable Presidential alerts on IOS?

I live in Germany, where Emergency alerts are being tested every 6-12 months. Since I'm rarely aware of them beforehand they tend to rip me out of sleep or scare the shit out if me when I don't expect them. I tried to disable test alerts, unfortunately, that doesn't seem to work. Is there a way to disable all of those alerts and how would I do that? Do I need to jailbreak my device in order to disable it?