hmm my KaiOS Nokia didn't bleep anything during the test alarm
edit: I actually did get a "Presidential Warnung" (??) but I didn't hear an alarm from the other room. Then I called the phone and heard the dial tone loud and clear. There's a chance it actually beeped and I just didn't hear it over the sirens and Androids screaming.
@elilla https://www.warntag-umfrage.de would probably like that info, but chances are it's just not supported. for some reason supported cell broadcast channels have changed over time and it's a whole issue
@elilla well, I know the reason I still think it's funny